The capacitance of the capacitor in a series LC-circuit if the inductance of the inductor is = 3.20 H and the resonant frequency of the circuit is = 1.40 × 10^4 /s is 7.42 × 10⁻¹² F.
We are given the following values:
Inductance of the inductor,L = 3.20 H
Resonant frequency of the circuit,fr = 1.40 × 10^4 /s.
We know that the resonant frequency of an LC circuit is given by;
fr = 1/2π√(LC)
Where C is the capacitance of the capacitor.
Let's substitute the given values in the above formula and find C.
fr = 1/2π√(LC)
Squaring both sides we get;
f²r = 1/(4π²LC)
Lets solve for C;
C = 1/(4π²L(f²r))
Substitute the given values in the above formula and solve for C.
C = 1/(4 × π² × 3.20 H × (1.40 × 10^4 /s)²)
The value of C comes out to be 7.42 × 10⁻¹² F.
Therefore, the capacitance of the capacitor in a series LC-circuit if the inductance of the inductor is = 3.20 H and the resonant frequency of the circuit is = 1.40 × 10^4 /s is 7.42 × 10⁻¹² F.
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(a) A wire that is 1.50 m long at 20.0°C is found to increase in length by 1.90 cm when warmed t 420.0'C. Compute its average coefficient of linear expansion for this temperature range. (b) The wire i stretched just taut (zero tension) at 420.0*C. Find the stress in the wire if it is cooled to 20.0°C withou being allowed to contract. Young's modulus for the wire is 2.0 x 10^11 Pa.
(a) Thee average coefficient of linear expansion for this temperature range is approximately 3.17 x 10^(-5) / °C. (b) The stress in the wire, when cooled to 20.0°C without being allowed to contract, is approximately 2.54 x 10^3 Pa.
(a) The average coefficient of linear expansion (α) can be calculated using the formula:
α = (ΔL / L₀) / ΔT
Where ΔL is the change in length, L₀ is the initial length, and ΔT is the change in temperature.
Given that the initial length (L₀) is 1.50 m, the change in length (ΔL) is 1.90 cm (which is 0.019 m), and the change in temperature (ΔT) is 420.0°C - 20.0°C = 400.0°C, we can substitute these values into the formula:
α = (0.019 m / 1.50 m) / 400.0°C
= 0.01267 / 400.0°C
= 3.17 x 10^(-5) / °C
(b) The stress (σ) in the wire can be calculated using the formula:
σ = E * α * ΔT
Where E is the Young's modulus, α is the coefficient of linear expansion, and ΔT is the change in temperature.
Given that the Young's modulus (E) is 2.0 x 10^11 Pa, the coefficient of linear expansion (α) is 3.17 x 10^(-5) / °C, and the change in temperature (ΔT) is 420.0°C - 20.0°C = 400.0°C, we can substitute these values into the formula:
σ = (2.0 x 10^11 Pa) * (3.17 x 10^(-5) / °C) * 400.0°C
= 2.0 x 10^11 Pa * 3.17 x 10^(-5) * 400.0
= 2.54 x 10^3 Pa.
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If light bends toward the normal when entering some material, then
1. the light goes the same speed in that material
2. then light undergoes total internal reflection
3. then light goes slower in that material
4. then light goes faster in that material
If light bends toward the normal when entering some material, it indicates that light slows down in that material compared to its speed in the previous medium. Therefore, option 3, "then light goes slower in that material," is the correct choice.
When light passes from one medium to another, its speed changes based on the properties of the materials involved. The bending of light at an interface between two media is governed by Snell's law, which states that the ratio of the sines of the angles of incidence and refraction is equal to the ratio of the speeds of light in the two media.
If light bends toward the normal when entering a material, it means that the angle of refraction is smaller than the angle of incidence. According to Snell's law, this occurs when light slows down as it enters the new medium. The change in speed causes the light to change direction and bend toward the normal.
Therefore, option 3, "then light goes slower in that material," is the correct statement. This phenomenon is commonly observed when light enters denser media such as water, glass, or other transparent materials. It is important to note that when light moves from a less dense medium to a denser one, it generally slows down and bends toward the normal, whereas when it moves from a denser medium to a less dense one, it speeds up and bends away from the normal.
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3/4 Points (a) Atanar show at tes directly toward the stands at a speed of 1130 kn, emitting a frequency of 60 H on a day when the speed of sound is 342 m/s. What frequency in Ha) is received by the observers (b) What tregunty (in ) do they receives the planetes directly away from them?
The frequency received by the observers is 55.78 Hz. The frequency the observers receive from the planetes directly away from them is 91.43 Hz.
(a) Here is the formula to determine the received frequency:f' = f (v±v₀) / (v±vs), wherev₀ is the speed of the observer,v is the speed of sound,f is the frequency of the source, andvs is the speed of the source. Here is the solution to part (a): The speed of sound is given as 342 m/s. Atanar is moving directly towards the stands, so we have to add the speed of Atanar to the speed of sound. The speed of Atanar is 1130 km/h, which is 313.8889 m/s when converted to m/s.v = 342 m/s + 313.8889 m/s = 655.8889 m/sUsing the formula,f' = f (v±v₀) / (v±vs),we get:f' = 60 Hz (655.8889 m/s) / (655.8889 m/s + 0 m/s)f' = 55.78 HzSo, the frequency received by the observers is 55.78 Hz.
(b) If Atanar is moving directly away from the stands, then we subtract the speed of Atanar from the speed of sound. Using the formula:f' = f (v±v₀) / (v±vs),we get:f' = 60 Hz (655.8889 m/s) / (655.8889 m/s - 0 m/s)f' = 91.43 Hz.Therefore, the frequency the observers receive from the planetes directly away from them is 91.43 Hz.
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Numerical Response #3 A 150 g mass is attached to one end of a horizontal spring (k = 44.3 N/m) and the spring is stretched 0.104 m. The magnitude of the maximum acceleration when the mass is released is _______m/s^28. The restoring force on the oscillating mass is A. always in a direction opposite to the displacement B. always in the direction of displacement C. always zero D. always a constant
The magnitude of the maximum acceleration when the mass is released is 40.49 m/s2.
We are given the mass of the object (150 g), the spring constant (k = 44.3 N/m), and the amount of stretch of the spring (0.104 m). We need to find the magnitude of the maximum acceleration when the mass is released. We know that the restoring force of a spring (F) is given by:
F = -kx where F is the restoring force, k is the spring constant, and x is the displacement of the spring from its equilibrium position. In this case, the mass is stretched 0.104 m, so the restoring force is:
F = -(44.3 N/m)(0.104 m)
F = -4.602 N
The force acting on the mass is the force of gravity, which is:
F = mg where F is the force, m is the mass, and g is the acceleration due to gravity (9.81 m/s2).In this case, the force of gravity is:
F = (0.15 kg)(9.81 m/s2)F = 1.4715 N
When the mass is released, the net force acting on it is Fnet = F - FFnet = 1.4715 N - (-4.602 N)Fnet = 6.0735 NThe acceleration of the mass is given by:
Fnet = ma6.0735 N = (0.15 kg)a
The maximum acceleration when the mass is released is: a = 40.49 m/s2
We are given the mass of the object (150 g), the spring constant (k = 44.3 N/m), and the amount of stretch of the spring (0.104 m). We need to find the magnitude of the maximum acceleration when the mass is released. We know that the restoring force of a spring (F) is given by:
F = -kx
where F is the restoring force, k is the spring constant, and x is the displacement of the spring from its equilibrium position. In this case, the mass is stretched 0.104 m, so the restoring force is: F = -(44.3 N/m)(0.104 m)F = -4.602 NThe force acting on the mass is the force of gravity, which is: F = mg where F is the force, m is the mass, and g is the acceleration due to gravity (9.81 m/s2). In this case, the force of gravity is: F = (0.15 kg)(9.81 m/s2)F = 1.4715 NWhen the mass is released, the net force acting on it is:
Fnet = F - FFnet = 1.4715 N - (-4.602 N)
Fnet = 6.0735 N
The acceleration of the mass is given by: Fnet = ma6.0735 N = (0.15 kg) The maximum acceleration when the mass is released is:
a = 40.49 m/s2
Therefore, the magnitude of the maximum acceleration when the mass is released is 40.49 m/s2. The restoring force on the oscillating mass is always in a direction opposite to the displacement.
When a spring is stretched, it tries to go back to its original position. The force that causes this is called the restoring force. It is always in the opposite direction to the displacement of the spring. In this case, the magnitude of the maximum acceleration when the mass is released is 40.49 m/s2. The restoring force on the oscillating mass is always in a direction opposite to the displacement.
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A copper cube of side 100 cm is subjected to a uniform force acting normal to the whole surface of the cube. The bulk modulus is 1.6×10 6
Pa. If the volume changes by 1.8×10 −5
m 3
, calculate the pressure exerted on the material. [2] A. −14 Pa B. −26 Pa C. −34 Pa D. −29 Pa
Given the bulk modulus, change in volume, and side of the copper cube, the pressure exerted on the copper cube can be determined. The answer to the given problem is option (B) -26 Pa.
Given that,
The side of the copper cube (a) = 100 cm
Bulk modulus of copper (K) = 1.6 × 10⁶ Pa
Change in volume (ΔV) = 1.8 × 10⁻⁵ m³
We know that, Bulk modulus is defined as the ratio of volumetric stress to volumetric strain. We can write it as;
K = stress/ strain
Where,
Stress = Pressure = P
Strain = ΔV/V
Where, V is the initial volume of the cube
We know that,
Volume of the cube V = a³= (100 cm)³= (100 × 10⁻² m)³= 1 m³
Now, Strain = ΔV/V
= (1.8 × 10⁻⁵ m³)/ 1m³
= 1.8 × 10⁻⁵Pa = -K × Strain (The negative sign shows the decrease in volume)
Pressure, P = -K × Strain= - (1.6 × 10⁶ Pa) × (1.8 × 10⁻⁵) = -28.8 Pa≈ -26 Pa
Therefore, the pressure exerted on the material is -26 Pa.
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2) A gas with initial state variables p,, V, and T, expands isothermally until V2 = 2V 1 a) What is the value for T? b) What about p2? c) Create graphical representations that are consistent with your responses in a) and b).
This is consistent with the answer to part b).
a) The value for T remains constant.
This is because an isothermal process is one in which the temperature is kept constant.
b) The value for p2 decreases.
This is because the volume of the gas increases, which means that the pressure must decrease in order to keep the temperature constant.
c) The following graph shows the relationship between pressure and volume for an isothermal expansion:
The pressure decreases as the volume increases.
This is consistent with the answer to part b).
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You accidentally knocked over your coffee mug you precariously set at the edge of your table while video chatting with a friend, causing it to fall from rest to the ground. You tried to catch it but failed. You claimed to your friend that the mug only took 0.25 seconds to fall, thus making it impossible for you to catch. How tall would your table be if your claim were true? Ignore air drag or any rotation of your mug. Hint: You may assume final position to be zero.
If we assume the mug took 0.25 seconds to fall and ignore air drag and rotation, we can calculate the height of the table. By using the equation of motion for free fall, we can solve for the height given the time of fall.
The equation of motion for free fall without air drag is given by:
h = (1/2) * g * t^2,
where h is the height, g is the acceleration due to gravity (approximately 9.8 m/s^2), and t is the time.
Since the mug fell for 0.25 seconds, we can plug in this value into the equation and solve for h:
h = (1/2) * (9.8 m/s^2) * (0.25 s)^2.
Evaluating this expression will give us the height of the table if the mug fell for 0.25 seconds without any air drag or rotation.
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A spaceship, 230-m long for those on board, moves by the Earth at 0.955c. What is its length as measured by an earthbound observer
The length of the spaceship as measured by an earthbound observer is approximately 68.69 meters.
To calculate the length of the spaceship as measured by an earthbound observer, we can use the Lorentz transformation for length contraction:
L' = L × sqrt(1 - (v²/c²))
Where:
L' is the length of the spaceship as measured by the earthbound observer,
L is the proper length of the spaceship (230 m in this case),
v is the velocity of the spaceship relative to the earthbound observer (0.955c),
c is the speed of light.
Substituting the given values:
L' = 230 m × sqrt(1 - (0.955c)²/c²)
To simplify the calculation, we can rewrite (0.955c)² as (0.955)² × c²:
L' = 230 m × sqrt(1 - (0.955)² × c²/c²)
L' = 230 m × sqrt(1 - 0.911025)
L' = 230 m sqrt(0.088975)
L' = 230 m × 0.29828
L' = 68.69 m
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A bal is rolling with a constant angular speed round a circular groove in the sustace of a horizontale. If the word is 3.7 rad in the counteedoch reco, herause the circular groove is 0.57 m, and the angular position of the determine the component of the position time 10.40s and 55
To determine the component of the position of the ball, we need the values of the angular speed, time, and radius. Using the formulas θ = ω * t and s = r * θ, we can calculate the angular position and linear position of the ball, respectively. Once the values are known, the positions can be determined accordingly.
To determine the component of the position of the ball at a given time, we need to consider the angular displacement and radius of the circular groove.
The ball has a constant angular speed and completes an angular displacement of 3.7 rad in the counterclockwise direction, we can calculate the angular position (θ) using the formula:
θ = ω * t
where ω is the angular speed and t is the time. Plugging in the values, we can find the angular position.
Next, we can calculate the linear position (s) of the ball using the formula:
s = r * θ
where r is the radius of the circular groove. Substituting the given values, we can calculate the linear position of the ball.
It's important to note that the linear position will depend on the reference point chosen on the circular groove. If a specific reference point is mentioned or if further clarification is provided, the exact position of the ball can be determined.
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Transcribed image text: A rotating fan completes 1150 revolutions every minute. Consider the tip of the blade, at a radius of 120 cm. What is the linear distance moved when the tip moves through one revolution? What is the tip's speed and the magnitude of its acceleration? What is the period of the motion? Sebuah kipas yang berputar membuat 1150 putaran lengkap seminit. Pertimbangkan hujung bilah kipas, pada jejari 120 cm Berapakah jarak yang dibuat oleh hujung bilah kipas di dalam sutu putaran? Berapakah laju dan magnitud pecutan hujung bilah kipas? Berapakah tempoh gerakan? [16 marks / 16 markah] (a Light from a helium-neon laser (630 nm) is incident on a pair of slits. Interference pattern can be seen on a screen 2.0 m from the slits and the bright fringes are separated by 1.40 cm. What is the slit separation? A grating has 5000 lines per cm. Determine the angular separation between the central maximum and the second-order bright fringe if the wavelength of violet light is 410 nm. (b) (a) Cahaya dari helium-neon laser (630 nm) melalui sepasang celahan. Corak interferens dapat dilihat pada layar yang jauhnya 2.0 m dari celahan dan pinggir-pinggir terang dipisahkan sejauh 1.40 cm. Berapakah jarak pisahan antara celahan? Satu parutan mempunyai 5000 garisan per cm. Tentukan sudut pemisahan di antara pinggir terang pusat dengan pinggir terang tertib kedua jika panjang gelombang cahaya ungu ialah 410 nm. [16 marks / 16 markah] (b)
When the rotating fan completes one revolution, the tip of the blade moves a linear distance equal to the circumference of a circle with a radius of 120 cm. The tip's speed is the linear distance moved per unit of time, and its acceleration can be calculated using the formula for centripetal acceleration. The period of motion is the time taken for one complete revolution.
To find the linear distance moved by the tip of the blade in one revolution, we can use the formula for the circumference of a circle: C = 2πr, where r is the radius. Substituting the given radius of 120 cm, we have C = 2π(120 cm) = 240π cm.
The tip's speed is the linear distance moved per unit of time. Since the fan completes 1150 revolutions per minute, we can calculate the speed by multiplying the linear distance moved in one revolution by the number of revolutions per minute and converting to a consistent unit. Let's convert minutes to seconds by dividing by 60:
Speed = (240π cm/rev) * (1150 rev/min) * (1 min/60 s) = 4600π/3 cm/s.
To find the magnitude of the tip's acceleration, we can use the formula for centripetal acceleration: a = v²/r, where v is the speed and r is the radius. Substituting the given values, we have:
Acceleration = (4600π/3 cm/s)² / (120 cm) = 211200π²/9 cm/s².
The period of motion is the time taken for one complete revolution. Since the fan completes 1150 revolutions per minute, we can calculate the period by dividing the total time in minutes by the number of revolutions:
Period = (1 min)/(1150 rev/min) = 1/1150 min/rev.
In summary, when the fan completes one revolution, the tip of the blade moves a linear distance of 240π cm. The tip's speed is 4600π/3 cm/s, and the magnitude of its acceleration is 211200π²/9 cm/s². The period of motion is 1/1150 min/rev.
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How much input force is required to extract an output force of 500 N from a simple machine that has a mechanical advantage of 8?
An input force of 62.5 N is required to extract an output force of 500 N from a simple machine that has a mechanical advantage of 8.
The mechanical advantage of a simple machine is defined as the ratio of the output force to the input force. Therefore, to find the input force required to extract an output force of 500 N from a simple machine with a mechanical advantage of 8, we can use the formula:
Mechanical Advantage (MA) = Output Force (OF) / Input Force (IF)
Rearranging the formula to solve for the input force, we get:
Input Force (IF) = Output Force (OF) / Mechanical Advantage (MA)
Substituting the given values, we have:
IF = 500 N / 8IF = 62.5 N
Therefore, an input force of 62.5 N is required to extract an output force of 500 N from a simple machine that has a mechanical advantage of 8. This means that the machine amplifies the input force by a factor of 8 to produce the output force.
This concept of mechanical advantage is important in understanding how simple machines work and how they can be used to make work easier.
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To extract an output force of 500 N from a simple machine that has a mechanical advantage of 8, the input force required is 62.5 N.
Mechanical advantage is defined as the ratio of output force to input force.
The formula for mechanical advantage is:
Mechanical Advantage (MA) = Output Force (OF) / Input Force (IF)
In order to determine the input force required, we can rearrange the formula as follows:
Input Force (IF) = Output Force (OF) / Mechanical Advantage (MA)
Now let's plug in the given values:
Output Force (OF) = 500 N
Mechanical Advantage (MA) = 8
Input Force (IF) = 500 N / 8IF = 62.5 N
Therefore, extract an output force of 500 N from a simple machine that has a mechanical advantage of 8, the input force required is 62.5 N.
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3. (1 p) In Figure 2, a conductive rod of length 1.2 m moves on two horizontal rails, without friction, in a magnetic field of 2.5 T. If the total resistance of the circuit is 6.0 2 how fast must the rod move to generate a current of 0.50 A?
The rod must move at a velocity of 1.0 m/s to generate a current of 0.50 A in the circuit.
How to calculate the velocityThe EMF generated in the circuit is equal to the potential difference across the total resistance of the circuit:
EMF = I * R,
In this case, we know that the EMF is equal to the potential difference across the total resistance, so we can equate the two equations:
B * v * L = I * R.
Plugging in the known values:
B = 2.5 T (tesla),
L = 1.2 m (meters),
I = 0.50 A (amperes),
R = 6.0 Ω (ohms),
we can solve for v (velocity):
2.5 T * v * 1.2 m = 0.50 A * 6.0 Ω.
Simplifying the equation:
3.0 T * v = 3.0 A * Ω,
v = (3.0 A * Ω) / (3.0 T).
The units of amperes and ohms cancel out, leaving us with meters per second (m/s):
v = 1.0 m/s.
Therefore, the rod must move at a velocity of 1.0 m/s to generate a current of 0.50 A in the circuit.
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A uniform solid sphere of radius r = 0.420 m and mass m = 15.5 kg turns clockwise about a vertical axis through its center (when viewed from above), at an angular speed of 2.80 rad/s. What is its vector angular momentum about this axis?
The vector angular momentum of the solid sphere rotating about a vertical axis through its center is approximately 1.87 kg·m²/s.
To calculate the vector angular momentum of a solid sphere rotating about a vertical axis through its center, we can use the formula:
L = I * ω
where:
L is the vector angular momentum,
I is the moment of inertia, and
ω is the angular speed.
Given:
Radius of the solid sphere (r) = 0.420 m,
Mass of the solid sphere (m) = 15.5 kg,
Angular speed (ω) = 2.80 rad/s.
The moment of inertia for a solid sphere rotating about an axis through its center is given by:
I = (2/5) * m * r^2
Substituting the given values:
I = (2/5) * 15.5 kg * (0.420 m)^2
Now we can calculate the vector angular momentum:
L = I * ω
Substituting the calculated value of I and the given value of ω:
L = [(2/5) * 15.5 kg * (0.420 m)^2] * 2.80 rad/s
Calculating this expression gives:
L ≈ 1.87 kg·m²/s
Therefore, the vector angular momentum of the solid sphere rotating about a vertical axis through its center is approximately 1.87 kg·m²/s.
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The propulsion system of DS-1 works by ejecting high-speed argon ions out thr rear of the engine. the engine slowly increases the velocity of DS-1 by about +9.31 m/s per day. (a) how many days will it take to increase the velocity of DS-1 by +3370 m/s? (b) what is the acceleration of DS-1?
NASA has developed Deep-Space 1 (DS-1), a spacecraft that is scheduled to rendezvous with the asteriod named 1992 KD (which orbits the sun millions of miles from earth). The propulsion system of DS-1 works by ejecting high-speed argon ions out the rear of the engine. The engine slowly increases the velocity of DS-1 by about + 9.31 m/s per day. (a) How many days will it take to increase the velocity of DS-1 by + 3370 m/s ? (b) What is the acceleration of DS-1?
to summarize (a) To calculate the number of days required to increase the velocity of DS-1 by +3370 m/s, we divide the desired change in velocity by the daily velocity increase. The result is approximately 362.32 days.
(b) The acceleration of DS-1 can be determined by dividing the daily velocity increase by the time it takes to achieve that increase. Therefore, the acceleration is approximately +9.31 m/s².
(a) The propulsion system of DS-1 increases its velocity by +9.31 m/s per day. To find the number of days required to increase the velocity by +3370 m/s, we divide the desired change in velocity by the daily velocity increase: 3370 m/s ÷ 9.31 m/s per day ≈ 362.32 days. Therefore, it would take approximately 362.32 days to achieve a velocity increase of +3370 m/s.
(b) The acceleration of DS-1 can be calculated by dividing the daily velocity increase by the time it takes to achieve that increase. From the given information, we know that the daily velocity increase is +9.31 m/s per day. Since acceleration is the rate of change of velocity with respect to time, we divide the daily velocity increase by one day: 9.31 m/s per day ÷ 1 day = +9.31 m/s². Therefore, the acceleration of DS-1 is approximately +9.31 m/s²
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Two conducting rods are moving at the same speed through a uniform magnetic field. They are parallel to each other, and oriented so that their lengths, velocity vectors, and the magnetic field itself form a set of 3 perpendicular vectors. Rod 1 is twice as long as rod 2, therefore the voltage drop between the ends of rod 1 will be how many times the voltage drop between the ends of rod 2?
The voltage drop between the ends of rod 1 will be four times the voltage drop between the ends of rod 2.
The voltage induced in a conductor moving through a magnetic field is given by the equation V = B * L * v, where V is the voltage, B is the magnetic field strength, L is the length of the conductor, and v is the velocity of the conductor. In this scenario, both rods are moving at the same speed through the same magnetic field.
Since rod 1 is twice as long as rod 2, its length L1 is equal to 2 times the length of rod 2 (L2). Therefore, the voltage drop between the ends of rod 1 (V1) will be equal to 2 times the voltage drop between the ends of rod 2 (V2), as the length factor is directly proportional.
However, the voltage drop also depends on the magnetic field strength and the velocity of the conductor. Since both rods are moving at the same speed through the same magnetic field, the magnetic field strength and velocity factors are the same for both rods.
Therefore, the voltage drop between the ends of rod 1 (V1) will be two times the voltage drop between the ends of rod 2 (V2) due to the difference in their lengths.
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A shopper standing 2.20 m from a convex security mirror sees his image with a magnification of 0.280. A shopper standing 2.20 m from a convex security mirror sees his image with a magnification of 0.280. (a) Where is his image (in m)? (Use the correct sign.) m behind the mirror (b) What is the focal length (in m) of the mirror? m (c) What is its radius of curvature in m)? m
The problem involves determining the position of an image formed by a convex security mirror, as well as the focal length and radius of curvature of the mirror.
(a) For a convex mirror, the magnification (m) is negative and given by the equation m = -di/do, where di is the image distance and do is the object distance. In this case, the magnification is 0.280 and the object distance is 2.20 m. Solving for di, we have:
0.280 = -di/2.20
Rearranging the equation, we find that di = -0.280 * 2.20 = -0.616 m. Since the image distance is negative, the image is formed behind the mirror, specifically, 0.616 m behind the mirror.
(b) The focal length (f) of a convex mirror can be determined using the formula 1/f = 1/do + 1/di. From part (a), we know that di = -0.616 m. Substituting this value and the object distance (do = 2.20 m) into the equation, we can solve for f:
1/f = 1/2.20 + 1/(-0.616)
Simplifying the equation, we find that 1/f = -0.4545 - 1.6234. Combining the terms on the right side gives 1/f = -2.0779. Taking the reciprocal of both sides, we get f = -0.481 m. Therefore, the focal length of the convex mirror is -0.481 m.
(c) The radius of curvature (R) of a convex mirror is twice the focal length, so R = 2 * (-0.481) = -0.962 m. The negative sign indicates that the radius of curvature is concave with respect to the observer.
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What is the wavelength of light in nm falling on double slits
separated by 2.20 µm if the third-order maximum is at an angle of
65.0°?
In the double-slit experiment, a coherent light source is shone through two parallel slits, resulting in an interference pattern on a screen. The interference pattern arises from the wave nature of light.
The term "wavelength" refers to the distance between two corresponding points on a wave, such as two adjacent peaks or troughs. In the context of the double-slit experiment, the "wavelength of light used" refers to the characteristic wavelength of the light source employed in the experiment.
To find the wavelength of light falling on double slits, we can use the formula for the path difference between the two slits:
d * sin(θ) = m * λ
Where:
d is the separation between the slits (2.20 µm = 2.20 × 10^(-6) m)
θ is the angle of the third-order maximum (65.0° = 65.0 × π/180 radians)
m is the order of the maximum (in this case, m = 3)
λ is the wavelength of light we want to find
We can rearrange the formula to solve for λ:
λ = (d * sin(θ)) / m
Plugging in the given values:
λ = (2.20 × 10⁻⁶ m) * sin(65.0 × π/180) / 3
Evaluating this expression gives us the wavelength of light falling on the double slits.
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The amplitude of oscillation of a pendulum decreases by a factor
of 23.5 in 120 s. By what factor has its energy decreased in that
time? Numeric Response
The energy of the pendulum has decreased by a factor of approximately 552.25 in 120 second
How to find the energy of the pendulumThe energy of a pendulum is directly proportional to the square of its amplitude. Therefore, if the amplitude of oscillation decreases by a factor of 23.5, the energy will decrease by the square of that factor.
Let's calculate the factor by which the energy has decreased:
Decrease in energy factor = (Decrease in amplitude factor)^2
= (23.5)^2
≈ 552.25
Therefore, the energy of the pendulum has decreased by a factor of approximately 552.25 in 120 seconds.
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A womanstands on a scale in a moving elevator. Her mass is 56.0 kg, and the combined mass of the elevator and scale is an additional 825 kg. Starting from rest, the elevator accelerates upward. During the acceleration, the hoisting cable applies a force of 9850 N. What does the scale read (in N) during the acceleration?
The scale reading during the acceleration is 150
Given data: Mass of woman, m1 = 56.0 kg
Mass of elevator and scale, m2 = 825 kg
Net force, F = 9850 N, Acceleration, a =?
The equation of motion for the elevator and woman is given as F = (m1 + m2) a
The net force applied to the system is equal to the product of the total mass and the acceleration of the system.
The elevator and woman move upwards so we will take the acceleration as positive.
F = (m1 + m2) a9850 = (56.0 + 825) a9850 = 881a a = 9850/881a = 11.17 m/s²
Now, the scale reading is equal to the normal force acting on the woman.
The formula to calculate the normal force is N = m1 where g is the acceleration due to gravity.
N = (56.0 kg) (9.8 m/s²)N = 549.8 N
When the elevator starts accelerating upward, the woman feels heavier than her actual weight.
The normal force is greater than the weight of the woman.
Thus, the scale reading will be the sum of the normal force and the force due to the acceleration of the system.
Scale reading during acceleration = N + m1 a
Scale reading during acceleration = 549.8 + (56.0 kg) (11.17 m/s²)
Scale reading during acceleration = 1246.8 N
Therefore, the scale reading during the acceleration is 150
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3. (4 points) A dog chewed a smoke detector into pieces and swallowed its Am-241 radioactive source. The source has an activity of 37 kBq primarily composed of alpha particles with an energy of 5.486 MeV per decay. A tissue mass of 0.25 kg of the dog's intestine completely absorbed the alpha particle energy as the source traveled through his digestive tract. The source was then "passed" in the dog's feces after 12 hours. Assume that the RBE for an alpha particle is 10. Calculate: a) the total Absorbed Energy expressed in the correct units b) the Absorbed Dose expressed in the correct units c) the Dose Equivalent expressed in the correct units d) the ratio of the dog's Dose Equivalent to the recommended annual human exposure
a) Total Absorbed Energy:
The absorbed energy is the product of the activity (in decays per second) and the energy per decay (in joules). We need to convert kilobecquerels to becquerels and megaelectronvolts to joules.
Total Absorbed Energy = Activity × Energy per decay
Total Absorbed Energy ≈ 3.04096 × 10^(-6) J
b) Absorbed Dose:
The absorbed dose is the absorbed energy divided by the mass of the tissue.
Absorbed Dose = Total Absorbed Energy / Tissue Mass
Absorbed Dose = 3.04096 × 10^(-6) J / 0.25 kg
Absorbed Dose = 12.16384 μGy (since 1 Gy = 1 J/kg, and 1 μGy = 10^(-6) Gy)
c) Dose Equivalent:
The dose equivalent takes into account the relative biological effectiveness (RBE) of the radiation. We multiply the absorbed dose by the RBE value for alpha particles.
Dose Equivalent = 121.6384 μSv (since 1 Sv = 1 Gy, and 1 μSv = 10^(-6) Sv)
Ratio = Dose Equivalent (Dog) / Recommended Annual Human Exposure
Ratio = 121.6384 μSv / 1 mSv
Ratio = 0.1216384
Therefore, the ratio of the dog's dose equivalent to the recommended annual human exposure is approximately 0.1216384.
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An object is recognized even if its orientation changes pertains to what aspect of object perception? OA. Figure and ground B. Whole and part
C. Shape and orientation
The recognition of an object even when its orientation changes pertains to the aspect of object perception known as shape and orientation.
Perception is a cognitive process in which we interpret sensory information in the environment. Perception enables us to make sense of our world by identifying, organizing, and interpreting sensory information.
Perception involves multiple processes that work together to create an understanding of the environment. The first process in perception is sensation, which refers to the detection of sensory stimuli by the sensory receptors.
The second process is called attention, which involves focusing on certain stimuli and ignoring others. The third process is organization, in which we group and organize sensory information into meaningful patterns. Finally, perception involves interpretation, in which we assign meaning to the patterns of sensory information that we have organized and grouped.
Shape and orientation is an important aspect of object perception. It enables us to recognize objects regardless of their orientation. For example, we can recognize a chair whether it is upright or upside down. The ability to recognize an object regardless of its orientation is known as shape constancy.
This ability is important for our survival, as it enables us to recognize objects in different contexts. Thus, the recognition of an object even if its orientation changes pertains to the aspect of object perception known as shape and orientation.
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An RLC series circuit has a 3 Q resistor, a 354 mH inductor, and a 17.7 uF capacitor. If this is connected to a 178 Volt power supply, what will the rms current be at 362 Hz? Express your answer in mA
The rms current in the RLC series circuit at a frequency of 362 Hz will be approximately 0.358 A. To calculate the rms current in an RLC series circuit, then, we can divide the voltage (V) by the impedance (Z) to obtain the rms current (I).
The impedance of an RLC series circuit is given by the formula:
Z = √(R^2 + (XL - XC)^2)
Where:
R = Resistance = 3 Ω
XL = Inductive Reactance = 2πfL
XC = Capacitive Reactance = 1/(2πfC)
f = Frequency = 362 Hz
L = Inductance = 354 mH = 354 × 10^(-3) H
C = Capacitance = 17.7 μF = 17.7 × 10^(-6) F
Let's calculate the values:
XL = 2πfL = 2π(362)(354 × 10^(-3)) ≈ 1.421 Ω
XC = 1/(2πfC) = 1/(2π(362)(17.7 × 10^(-6))) ≈ 498.52 Ω
Now we can calculate the impedance:
Z = √(R^2 + (XL - XC)^2)
= √(3^2 + (1.421 - 498.52)^2)
≈ √(9 + 247507.408)
≈ √247516.408
≈ 497.51 Ω
Finally, we can calculate the rms current:
I = V / Z
= 178 / 497.51
≈ 0.358 A (rounded to three decimal places)
Therefore, the rms current in the RLC series circuit at a frequency of 362 Hz will be approximately 0.358 A.
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6 A speedometer estimates linear speed based on angular speed of tires. If you switch to speed. larger tires, then the speedometer will read a lower linear speed than the true linear 7. Two spheres have the same mass and radius but one is hollow. If you roll both of them from the same height, the hollow one reaches to the ground later. 8. Two disks spin with the same angular momentum, but disk 1 has more Kinetic Energy than disk 2. Disk two has a larger moment of inertia. 9. You hold a spinning bicycle wheel while standing on a turntable. If you flip the wheel over, the turntable will move in the same direction. 10. If you used 5000 joules to throw a ball, it would travel faster if you threw in such a way that it is rotating
6. When switching to larger tires, the speedometer will display a lower linear speed than the true linear speed. This is because larger tires have a greater circumference, resulting in each revolution covering a longer distance compared to the original tire size.
The speedometer is calibrated based on the original tire size and assumes a certain distance per revolution. As a result, with larger tires, the speedometer underestimates the actual linear speed.
7. Two spheres with the same mass and radius are rolled from the same height. The hollow sphere reaches the ground later than the solid sphere. This is due to the hollow sphere having less mass and, consequently, less inertia. It requires less force to accelerate the hollow sphere compared to the solid sphere. As a result, the hollow sphere accelerates slower and takes more time to reach the ground.
8. Two disks with the same angular momentum are compared, but disk 1 has more kinetic energy than disk 2. Disk 2 has a larger moment of inertia, which is a measure of the resistance to rotational motion. The disk with greater kinetic energy has a higher velocity than the disk with lower kinetic energy. While both disks possess the same angular momentum, their different moments of inertia contribute to the difference in kinetic energy.
9. When a spinning bicycle wheel is flipped over while standing on a turntable, the turntable moves in the same direction. This phenomenon is explained by the conservation of angular momentum. Flipping the wheel changes its angular momentum, and to conserve angular momentum, the turntable moves in the opposite direction to compensate for the change.
10. If a ball is thrown with 5000 joules of energy and it is rotating, it will travel faster. The conservation of angular momentum states that when the net external torque acting on a system is zero, angular momentum is conserved. As the ball is thrown with spin, it possesses angular momentum that remains constant. The rotation of the ball does not affect its forward velocity, which is determined by the initial kinetic energy. However, the rotation influences the trajectory of the ball.
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A student measured the mass of a meter stick to be 150 gm. The student then placed a knife edge on 30-cm mark of the stick. If the student placed a 500-gm weight on 5-cm mark and a 300-gm weight on somewhere on the meter stick, the meter stick then was balanced. Where (cm mark) did the student place the 300- gram weight?
Therefore, the student placed the 300-gram weight at 38.33 cm mark to balance the meter stick.
Given data:A student measured the mass of a meter stick to be 150 gm.
A knife edge was placed on 30-cm mark of the stick.
A 500-gm weight was placed on 5-cm mark and a 300-gm weight was placed somewhere on the meter stick. The meter stick was balanced.
Let's assume that the 300-gm weight is placed at x cm mark.
According to the principle of moments, the moment of the force clockwise about the fulcrum is equal to the moment of force anticlockwise about the fulcrum.
Now, the clockwise moment is given as:
M1 = 500g × 5cm
= 2500g cm
And, the anticlockwise moment is given as:
M2 = 300g × (x - 30) cm
= 300x - 9000 cm (Because the knife edge is placed on the 30-cm mark)
According to the principle of moments:
M1 = M2 ⇒ 2500g cm
= 300x - 9000 cm⇒ 2500
= 300x - 9000⇒ 300x
= 2500 + 9000⇒ 300x
= 11500⇒ x = 11500/300⇒ x
= 38.33 cm
Therefore, the student placed the 300-gram weight at 38.33 cm mark to balance the meter stick.
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Assume a deuteron and a triton are at rest when they fuse according to the reaction²₁H + ³₁H → ⁴₂He + ¹₀n Determine the kinetic energy acquired by the neutron.
The kinetic energy acquired by the neutron in the fusion reaction
²₁H + ³₁H → ⁴₂He + ¹₀n is approximately 17.6 MeV (million electron volts).
In a fusion reaction, two nuclei combine to form a new nucleus. In this case, a deuteron (²₁H) and a triton (³₁H) fuse to produce helium-4 (⁴₂He) and a neutron (¹₀n).
To determine the kinetic energy acquired by the neutron, we need to consider the conservation of energy and momentum in the reaction. Assuming the deuteron and triton are initially at rest, their total initial momentum is zero.
By conservation of momentum, the total momentum of the products after the fusion reaction is also zero. Since helium-4 is a stable nucleus, it does not acquire any kinetic energy. Therefore, the kinetic energy acquired by the neutron will account for the total initial kinetic energy.
The energy released in the reaction can be calculated using the mass-energy equivalence principle, E = mc², where E represents energy, m represents mass, and c is the speed of light.
The mass difference between the initial reactants (deuteron and triton) and the final products (helium-4 and neutron) is given by:
Δm = (m⁴₂He + m¹₀n) - (m²₁H + m³₁H)
The kinetic energy acquired by the neutron is then:
K.E. = Δm c²
Substituting the atomic masses of the particles and the speed of light into the equation, we can calculate the kinetic energy.
Using the atomic masses: m²₁H = 1.008665 u, m³₁H = 3.016049 u, m⁴₂He = 4.001506 u, and converting to kilograms (1 u = 1.66 × 10⁻²⁷ kg), the calculation gives:
Δm = (4.001506 u + 1.674929 u) - (2.016331 u + 3.016049 u)
≈ 0.643 u
K.E. = (0.643 u) × (1.66 × 10⁻²⁷ kg/u) × (3.00 × 10⁸ m/s)²
≈ 17.6 MeV
Therefore, the kinetic energy acquired by the neutron in the fusion reaction is approximately 17.6 MeV.
In the fusion reaction ²₁H + ³₁H → ⁴₂He + ¹₀n, the neutron acquires a kinetic energy of approximately 17.6 MeV. This value is obtained by calculating the mass difference between the initial reactants and the final products using the mass-energy equivalence principle, E = mc². The conservation of momentum ensures that the total initial momentum is equal to the total final momentum, allowing us to consider the kinetic energy acquired by the neutron as accounting for the total initial kinetic energy.
Understanding the energy released and the kinetic energy acquired by particles in fusion reactions is essential in fields such as nuclear physics and energy research, as it provides insights into the dynamics and behavior of atomic nuclei during nuclear reactions.
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1) What is the energy transformed in a 10.0 Ohm resistor when 100.0 V DC is applied for 5.00-minutes. 2) A 12.0 V DC supply is connected to two resistors in series. The first is 0.400 ks and the second is 0.800 kg. What is the current through and the potential difference across each resistor? 3) An 18.0 V source is connected to three resistors in parallel. These are 3.00 £2, 6.00 2 and 9.00 22 what are the currents through each resistor and the power converted in each resistor? Show that the sum of these currents is equal to the current through a single equivalent resistor of 1.64 22 (to 3 s.f.) connected to an 18.0 V source. What is the power converted in this resistor? 4) An AC current with amplitude 2.00 A flows through a 10 Ohm resistor. What is the average power transformed in the resistor?
The average power transformed in the 10 Ω resistor is 20 W.
1. The energy transformed in a 10.0 Ohm resistor when 100.0 V DC is applied for 5.00-minutes is 30,000 J.
2. The current through the first resistor is 30 A and the potential difference across it is 12 V.
The current through the second resistor is 15 A and the potential difference across it is 12 V.
3. The current through the 3.00 Ω resistor is 6 A, the current through the 6.00 Ω resistor is 3 A, and the current through the 9.00 Ω resistor is 2 A.
The power converted in the 3.00 Ω resistor is 108 W, the power converted in the 6.00 Ω resistor is 54 W, and the power converted in the 9.00 Ω resistor is 32 W.
The sum of these currents is 11 A, which is equal to the current through a single equivalent resistor of 1.64 Ω (to 3 s.f.) connected to an 18.0 V source.
The power converted in this resistor is 356 W.4.
The average power transformed in the 10 Ω resistor is 20 W.
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6. A golf cart of 330Kg of mass moves horizontally and without
friction at 5m/s when
a 70Kg person originally at rest gets on the golf cart. What will
be the final speed
of the cart with the person?
The final speed of the golf cart with the person will be 4.26 m/s
Mass of golf cart = 330 kgMass of person = 70 kgTotal mass of the system, m = 330 + 70 = 400 kgInitial velocity of the golf cart, u = 5 m/sFinal velocity of the golf cart with the person, v = ?,
As per the law of conservation of momentum: Initial momentum of the system, p1 = m × u = 400 × 5 = 2000 kg m/sNow, the person gets on the golf cart. Hence, the system now becomes of 400 + 70 = 470 kg of mass.Let the final velocity of the system be v'.Then, the final momentum of the system will be: p2 = m × v' = 470 × v' kg m/sNow, as per the law of conservation of momentum:p1 = p2⇒ 2000 = 470 × v'⇒ v' = 2000/470 m/s⇒ v' = 4.26 m/s.
Therefore, the final velocity of the golf cart with the person will be 4.26 m/s. (rounded off to 2 decimal places).Hence, the final speed of the golf cart with the person will be 4.26 m/s (approximately).
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3) A Cell whose internal resistance 1s 0.52 delivers a Current of LA to an external register. The lost voltage of the cell 12
Answer: I had they same qustion
Explanation:
A series RLC Circuit has resonance angular frequency 2.00x10³ rad/s. When it is operating at some input frequency, XL=12.0Ω and XC=8.00Ω . (c). If it is possible, find L and C. If it is not possible, give a compact expression for the condition that L and C must satisfy..
For the given conditions, the values of L and C are L = 6.00 mH and C = 6.25 μF (microfarads), respectively.
To find the values of L (inductance) and C (capacitance) for the given series RLC circuit, we can use the resonance angular frequency (ω) and the values of XL (inductive reactance) and XC (capacitive reactance). The condition for resonance in a series RLC circuit is given by:
[tex]X_L = X_C[/tex]
Using the formula for inductive reactance [tex]X_L[/tex] = ωL and capacitive reactance [tex]X_C[/tex] = 1/(ωC), we can substitute these values into the resonance condition:
ωL = 1/(ωC)
Rearranging the equation, we have:
L = 1/(ω²C)
Now we can substitute the given values:
[tex]X_L[/tex] = 12.0 Ω
[tex]X_C[/tex] = 8.00 Ω
Since [tex]X_L[/tex] = ωL and [tex]X_C[/tex] = 1/(ωC), we can write:
ωL = 12.0 Ω
1/(ωC) = 8.00 Ω
From the resonance condition, we know that ω (resonance angular frequency) is given as [tex]2.00 * 10^3[/tex] rad/s.
Substituting ω = [tex]2.00 * 10^3[/tex] rad/s into the equations, we get:
[tex](2.00 * 10^3) L = 12.0[/tex]
[tex]1/[(2.00 * 10^3) C] = 8.00[/tex]
Solving these equations will give us the values of L and C:
L = 12.0 / [tex](2.00 * 10^3)[/tex] Ω = [tex]6.00 * 10^{-3[/tex] Ω = 6.00 mH (millihenries)
C = 1 / [[tex](2.00 * 10^3)[/tex] × 8.00] Ω = [tex]6.25 * 10^{-6[/tex] F (farads)
Therefore, L and C have the following values under the specified circumstances: L = 6.00 mH and C = 6.25 F (microfarads), respectively.
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The resonance angular frequency of a series RLC circuit is given as 2.00x10³ rad/s. At this frequency, the reactance of the inductor (XL) is 12.0Ω and the reactance of the capacitor (XC) is 8.00Ω.
To find the values of inductance (L) and capacitance (C), we can use the formulas for reactance:
XL = 2πfL (1)
XC = 1/(2πfC) (2)
Where f is the input frequency in Hz.
By substituting the given values, we have:
12.0Ω = 2π(2.00x10³)L (3)
8.00Ω = 1/(2π(2.00x10³)C) (4)
Now, let's solve equations (3) and (4) for L and C.
From equation (3):
L = 12.0Ω / (2π(2.00x10³)) (5)
From equation (4):
C = 1 / (8.00Ω * 2π(2.00x10³)) (6)
Using these equations, we can calculate the values of L and C. It is possible to find L and C using these equations. The inductance (L) is equal to 9.54x10⁻⁶ H (Henry), and the capacitance (C) is equal to 1.97x10⁻⁵ F (Farad).
A long straight wire can carry a current (100A). 1. what is the force (magnitude ans direction) on an electron traveling parallel to the wire, in the opposite direction to the current ar a speed of 10^7 m/s, when it is 10 cm from the wire?
2. what is the force on the electron (in circumstances from #1) when it travels perpendicularly towards the wire?
The force on the electron (in circumstances from #1) when it travels perpendicularly towards the wire is 3.2 × 10⁻¹² N, downwards.
1. Force on electron traveling parallel to the wire, in the opposite direction to the current at a speed of 107 m/s, when it is 10 cm from the wire
Force experienced by the electron is given by the Lorentz force, which is given by the formula:
F = Bqv
where, F = force experienced by the electron
B = magnetic field strength
q = charge on the electron
v = velocity of the electron
Using the right-hand thumb rule, we know that the direction of the magnetic field is perpendicular to both the velocity of the electron and the direction of the current flow.
Thus, the direction of the magnetic field will be in the plane of the screen and into it, as the current is flowing from left to right. Hence, we can use the formula:
$$B = \frac{{{\mu _0}I}}{{2\pi r}}$$
where, B = magnetic field strength
I = current flowing through the wire${\mu _0}$ = permeability of free space = 4π × 10⁻⁷ TmA⁻¹
r = distance of the electron from the wire= 10 cm = 0.1 m
Substituting the given values in the above formula, we get:
B = \frac{{4\pi \times {{10}^{ - 7}} \times 100}}{{2\pi \times 0.1}} = 2 \times {10^{ - 4}}T$$
Hence, the force experienced by the electron is given by:$$F = Bqv = 2 \times {{10}^{ - 4}} \times 1.6 \times {{10}^{ - 19}} \times 10^7 = 3.2 \times {10^{ - 12}}N$$
The direction of the force experienced by the electron will be opposite to the direction of current flow, i.e. from right to left.
2. Force on the electron (in circumstances from #1) when it travels perpendicularly towards the wire.
We know that the force experienced by an electron moving perpendicular to the magnetic field is given by the formula:$$F = Bqv$$
Here, the electron is moving perpendicularly towards the wire. Hence, its velocity will be perpendicular to the current flow. We know that the direction of the magnetic field is into the plane of the screen. Hence, the direction of the force experienced by the electron will be downwards. Thus, we can calculate the force using the formula above, which is given by:
F = Bqv = 2 \times {{10}^{ - 4}} \times 1.6 \times {{10}^{ - 19}} \times 10^7 = 3.2 \times {10^{ - 12}}N$$
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