The magnitude of the acceleration of the proton is approximately 2.25 × 10^17 m/s^2. We can use Coulomb's law and Newton's second law.
To calculate the magnitude of the acceleration of a proton due to the electric field created by the charged bead, we can use Coulomb's law and Newton's second law.
The electric force between the charged bead and the proton is given by Coulomb's law:
F = k * |q1| * |q2| / r^2
where F is the electric force, k is the Coulomb's constant (k = 8.99 × 10^9 N m^2/C^2), |q1| and |q2| are the magnitudes of the charges, and r is the distance between them.
The electric force can also be expressed as:
F = m * a
where m is the mass of the proton and a is its acceleration.
Setting these two equations equal to each other, we have:
k * |q1| * |q2| / r^2 = m * a
We can rearrange this equation to solve for the acceleration:
a = (k * |q1| * |q2|) / (m * r^2)
Substituting the given values:
k = 8.99 × 10^9 N m^2/C^2,
|q1| = 11 nC = 11 × 10^-9 C,
|q2| = charge of a proton = 1.6 × 10^-19 C,
m = mass of a proton = 1.67 × 10^-27 kg,
r = 0.60 cm = 0.60 × 10^-2 m,
we can calculate the acceleration:
a = (8.99 × 10^9 N m^2/C^2 * 11 × 10^-9 C * 1.6 × 10^-19 C) / (1.67 × 10^-27 kg * (0.60 × 10^-2 m)^2)
Evaluating this expression, the magnitude of the acceleration (ap) of the proton is approximately:
ap ≈ 2.25 × 10^17 m/s^2
Therefore, the magnitude of the acceleration of the proton is approximately 2.25 × 10^17 m/s^2.
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When laser light of some unknown wavelength hits a pair of thin slits separated by 0.128 mm, it produces bright fringes separated by 8.32 mm on a screen that is 2.23 m away. Given the pattern formed, what must be the wavelength of the light (in nm )?
The problem involves determining the wavelength of laser light based on the observed fringe pattern produced by a pair of thin slits.
The given information includes the separation between the slits (0.128 mm) and the separation of the bright fringes on a screen placed 2.23 m away (8.32 mm). We need to calculate the wavelength of the light in nanometers.
To find the wavelength, we can use the equation for the fringe separation in the double-slit interference pattern:
λ = (d * D) / L
where λ is the wavelength of the light, d is the separation between the slits, D is the separation of the bright fringes on the screen, and L is the distance from the slits to the screen.
Plugging in the given values, we have:
λ = (0.128 mm * 8.32 mm) / 2.23 m
Converting the millimeter and meter units, and simplifying the expression, we find:
λ ≈ 611 nm
Therefore, the wavelength of the laser light is approximately 611 nm.
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At a point a distance r=1.10 m from the origin on the positive x-axis, find the magnitude and direction of the magnetic field. (a) magnitude of the magnetic field (in T ) T (b) direction of the magnetic field +x-direction −x-direction +y-direction −y-direction +z-direction -z-direction At a point the same distance from the origin on the negative y-axis, find the magnitude and direction of the magnetic field. (c) magnitude of the magnetic field (in T ) At a point a distance r=1.10 m from the origin on the positive x-axis, find the magnitude and direction of the magnetic field. (a) magnitude of the magnetic field (in T ) T (b) direction of the magnetic field +x-direction −x-direction +y-direction −y-direction +z-direction −z-direction At a point the same distance from the origin on the negative y-axis, find the magnitude and direction of the magnetic field. (c) magnitude of the magnetic field (in T) T (d) direction of the magnetic field +x-direction
(a) The magnitude of the magnetic field at a point a distance r=1.10 m from the origin on the positive x-axis is 0.063 T.
(b) The direction of the magnetic field is +x-direction.
(c) The magnitude of the magnetic field at a point the same distance from the origin on the negative y-axis is 0.063 T.
(d) The direction of the magnetic field is −y-direction.
The magnetic field at a point due to a current-carrying wire is given by the Biot-Savart law:
B = µo I / 2πr sinθ
where µo is the permeability of free space, I is the current in the wire, r is the distance from the wire to the point, and θ is the angle between the wire and the line connecting the wire to the point.
In this case, the current is flowing in the +x-direction, the point is on the positive x-axis, and the distance from the wire to the point is r=1.10 m. Therefore, the angle θ is 0 degrees.
B = µo I / 2πr sinθ = 4π × 10-7 T⋅m/A × 1 A / 2π × 1.10 m × sin(0°) = 0.063 T
Therefore, the magnitude of the magnetic field at the point is 0.063 T. The direction of the magnetic field is +x-direction, because the current is flowing in the +x-direction and the angle θ is 0 degrees.
The same calculation can be done for the point on the negative y-axis. The only difference is that the angle θ is now 90 degrees. Therefore, the magnitude of the magnetic field at the point is still 0.063 T, but the direction is now −y-direction.
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A 0.46 kg mass is attached to a light spring with a force constant of 38.9 N/m and set into oscilation on a horizontal frictionless surface. (Hint: The angular frequency, a, of an ideal mass-spring system is given by w Where k is the spring constant, and m is the mass value. Hint2: The maximum displacement is the amplitude A, the maximum velocity is wa, and the maximum acceleration is orA) of the spring is stretched 5.0 cm and released from rest, determine the following (a) maximum speed of the oscillating mass m's ) speed of the oscillating mass when the spring is compressed 1.5 cm from the equilibrium position my's () speed of the oscillating mass when the spring is stretched 1.5 cm from the equilibrium position ms (d) value of x at which the speed of the oscillating mass is equal to one-half the maximum value mת Blue-green light has a frequency of about 5.8 x 1014 Hz.Using 3.0 x 10 m/s for the speed of light and using the relationship v- find the wavelength of this light in air. Wavelength is How does this wavelength compare with the size of an atom, which is about 10-19 m? wavelength times the size of an atom. atom size 10-10 m Comparing to the size of an atom is important because usually you need a wavelength smaller than an object to be able to detector image the object. MY NOTES - -/13 Points) DETAILS A certain radar installation used to track airplanes transmits electromagnetic radiation of wavelength 2.1 cm. (a) What is the frequency of this radiation, measured in billions of hertz (GHz)? GHz (b) What is the time required for a pulse of radar waves to reach an airplane 4.1 km away and return?
The ratio of wavelength to the size of an atom is;5.17 × 10⁻⁷ m ÷ 10⁻¹⁹ m = 5.17 × 10¹²The ratio of wavelength to the size of an atom is 5.17 × 10¹².
Given the following values,Mass (m) = 0.46 kg
Spring constant (k) = 38.9 N/m
Maximum displacement (A) = 5.0 cm
Maximum speed (vm) = wa
Maximum acceleration (am) = ω² A
Where,ω = angular frequencyω = √(k/m)
A) Maximum speed of the oscillating mass is given by;vm = wa ...[1]
We know that,angular frequency, ω = √(k/m)ω = √(38.9/0.46)ω = 4.0418 rad/s
Substitute the value of ω in [1];
vm = wa = ω × Avm = 4.0418 rad/s × 0.05 mvm = 0.2021 m/s
Therefore, the maximum speed of the oscillating mass is 0.2021 m/s.B) Speed of the oscillating mass when the spring is compressed 1.5 cm from the equilibrium position.
We know that,displacement, x = -0.015 m (compressed)
The equation of motion for the displacement x is;
x = Acos(ωt + φ)
Differentiate with respect to time to obtain the velocity;v = dx/dtv = -Aωsin(ωt + φ)At maximum displacement, sin(ωt + φ) = 1
Therefore;
vmax = -Aω ...[2]
Substitute the value of A and ω in [2];
vmax = -Aω = -0.05 m × 4.0418 rad/svmax = -0.2021 m/s
At x = -0.015 m,
x = Acos(ωt + φ)cos(ωt + φ) = x/Acos(ωt + φ) = -0.015/0.05 = -0.3
Differentiate with respect to time to obtain the velocity;
v = dx/dtv = -Aωsin(ωt + φ)
At cos(ωt + φ) = -0.3, sin(ωt + φ) = -0.9599
Therefore;v = -0.2021 m/s × -0.9599v = 0.1941 m/s
Therefore, the speed of the oscillating mass when the spring is compressed 1.5 cm from the equilibrium position is 0.1941 m/s.
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A small rock is thrown vertically upward with a speed of 28.4 m/s from the edge of the roof of a 35.5 m tall building. The rock doesn't hit the building on its way back down and lands on the street below. Ignore air resistance. (a) What is the speed (in m/s ) of the rock just before it hits the street? (b) How much time (in sec) elapses from when the rock is thrown until it hits the street?
To determine the speed of the rock just before it hits the street, we need to apply the conservation of energy principle. The total energy of the rock is equal to the sum of its potential energy.
At the top of the building and its kinetic energy just before hitting the street. E_total = E_kinetic + E_potentialUsing the conservation of energy formula and the known values, E_total = E_kinetic + E_potential(1/2)mv² + mgh = mghence (1/2) v² = ghv = √2ghwhere m is the mass of the rock, v is its velocity, g is the acceleration due to gravity, and h is the height of the building.
The velocity of the rock just before hitting the street is 83.0 m/s. b) We can find the time taken by the rock to hit the street using the following kinematic equation, where is the displacement, Vi is the initial velocity, g is the acceleration due to gravity, and t is the time taken. From the equation, At the top of the building and g = 9.8 m/s². Solving the quadratic equation.
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Given the vector A=i+ j and A=j + k. Find A+B and magnitude of A + B. write only the answers and round to two decimal places Answer:
Given vectors A = i + j and A = j + k, we are asked to find A + B and the magnitude of A + B.
To find A + B, we add the corresponding components of the vectors:
A + B = (1i + 1j) + (1i + 2j + 1k)
= 2i + 3j + 1k
To find the magnitude of A + B, we use the magnitude formula:
Magnitude of A + B = sqrt((2)^2 + (3)^2 + (1)^2)
= sqrt(4 + 9 + 1)
= sqrt(14)
Therefore, A + B is equal to 2i + 3j + 1k, and the magnitude of A + B is sqrt(14).
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If a sprinter runs a 200 m in 21.34 s, what is their average
velocity in m/s?
The average velocity of a sprinter who runs 200 m in 21.34 s is 9.37 m/s.
Here's how we can calculate it:
We know that average velocity is equal to displacement divided by time. In this case, the displacement is 200 m (since that's how far the sprinter ran) and the time is 21.34 s.
Therefore, we can write the formula as:
v = d/t
where:
v = average velocity
d = displacement
t = time
Now, we can substitute the values:
v = 200 m / 21.34 sv = 9.37 m/s
So the average velocity of the sprinter is 9.37 m/s.
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Zink has a work function of 4.3 eV. Part A What is the longest wavelength of light that will release an election from a surface Express your answer with the appropriate units.
The longest wavelength of light that can cause the release of electrons from a metal with a work function of 3.50 eV is approximately 354 nanometers.
The energy of a photon of light is given by [tex]E = hc/λ[/tex], where E is the energy, h is the Planck constant ([tex]6.63 x 10^-34 J·s),[/tex]c is the speed of light [tex](3 x 10^8 m/s)[/tex], and λ is the wavelength of light. The work function of the metal represents the minimum energy required to release an electron from the metal's surface.
To calculate the longest wavelength of light, we can equate the energy of a photon to the work function: [tex]hc/λ = 3.50 eV[/tex]. Rearranging the equation, we have λ = hc/E, where E is the work function. Substituting the values for h, c, and the work function,
we get λ[tex]= (6.63 x 10^-34 J·s)(3 x 10^8 m/s) / (3.50 eV)(1.6 x 10^-19 J/eV).[/tex]Solving this equation gives us λ ≈ 354 nanometers, which is the longest wavelength of light that can cause the release of electrons from the metal.
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The longest wavelength of light that will release an electron from a zinc surface is approximately 2.89 x 10^-7 meters (or 289 nm).
To determine the longest wavelength of light that will release an electron from a zinc surface, using the concept of the photoelectric effect and the equation relating the energy of a photon to its wavelength.
The energy (E) of a photon can be calculated:
E = hc/λ
Where:
E is the energy of the photon
h is Planck's constant (6.626 x 10⁻³⁴ J·s)
c is the speed of light (3.00 x 10⁸ m/s)
λ is the wavelength of light
In the photoelectric effect, for an electron to be released from a surface, the energy of the incident photon must be equal to or greater than the work function (Φ) of the material.
E ≥ Φ
The work function of zinc is 4.3 eV
The conversion factor is 1 eV = 1.6 x 10⁻¹⁹ J.
Φ = 4.3 eV × (1.6 x 10⁻¹⁹ J/eV) = 6.88 x 10⁻¹⁹ J
rearrange the equation for photon energy and substitute the work function:
hc/λ ≥ Φ
λ ≤ hc/Φ
Putting the values:
λ ≤ (6.626 x 10⁻³⁴× 3.00 x 10⁸ ) / (6.88 x 10⁻¹⁹ J)
λ ≤ (6.626 x 10³⁴ J·s × 3.00 x 10⁸ m/s) / (6.88 x 10⁻¹⁹ J)
λ ≤ 2.89 x 10⁻⁷ m
Thus, the longest wavelength of light that will release an electron from a zinc surface is approximately 2.89 x 10^-7 meters (or 289 nm).
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A 50 kg student bounces up from a trampoline with a speed of 3.4 m/s. Determine the work done on the student by the force of gravity when she is 5.3 m above the trampoline.
The work done on the student by the force of gravity when she is 5.3 m above the trampoline is approximately 2574 Joules.
To determine the work done on the student by the force of gravity, we need to calculate the change in potential-energy. The gravitational potential energy (PE) of an object near the surface of the Earth is given by the formula:
PE = m * g * h
where m is the mass of the object, g is the acceleration due to gravity, and h is the height above the reference level.
In this case, the student's mass is 50 kg and the height above the trampoline is 5.3 m. We can calculate the initial potential energy (PEi) when the student is on the trampoline and the final potential energy (PEf) when the student is 5.3 m above the trampoline.
PEi = m * g * h_initial
PEf = m * g * h_final
The work done by the force of gravity is the change in potential energy, which can be calculated as:
Work = PEf - PEi
Let's calculate the work done on the student by the force of gravity:
PEi = 50 kg * 9.8 m/s² * 0 m (height on the trampoline)
PEf = 50 kg * 9.8 m/s² * 5.3 m (height 5.3 m above the trampoline)
PEi = 0 J
PEf = 50 kg * 9.8 m/s² * 5.3 m
PEf ≈ 2574 J
Work = PEf - PEi
Work ≈ 2574 J - 0 J
Work ≈ 2574 J
Therefore, the work done on the student by the force of gravity when she is 5.3 m above the trampoline is approximately 2574 Joules.
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. The FM station 100.3 a) sends out what type of electromagnetic waves? b) what is its frequency? c) what is its wave speed? d) what is its wavelength?
(a) FM stations transmit electromagnetic waves in the radio frequency range.
(b) The frequency of the FM station is given as 100.3, which represents the frequency in megahertz (MHz).
(c) To calculate the wave speed, we need additional information, such as the wavelength or the propagation medium so we cannot determine in this case.
(d) We also cannot calculate wavelength as we don't know wave speed.
a) FM stations transmit electromagnetic waves in the radio frequency range.
b) The frequency of the FM station is given as 100.3, which represents the frequency in megahertz (MHz).
c) The wave speed of electromagnetic waves can be
wave speed = frequency × wavelength.
To determine the wave speed, we need to convert the frequency from MHz to hertz (Hz). Since 1 MHz = 1 × 10^6 Hz, the frequency of the FM station is:
frequency = 100.3 × 10^6 Hz.
To calculate the wave speed, we need additional information, such as the wavelength or the propagation medium.
d) The wavelength of the FM wave can be determined by rearranging the wave speed formula:
wavelength = wave speed / frequency.
Without knowing the specific wave speed or wavelength, we cannot directly calculate the wavelength of the FM wave. However, we can calculate the wavelength if we know the wave speed or vice versa.
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Show that x(t) = xm exp(-ßt) exp(±iwt) is a solution of the equation m kx = 0, where w and are defined by functions of m, k, and b. (10 pts) Show that y(x, t) = ym exp(i(kx ± wt)) is a solution of the wave equation dx² where v = w/k. (10 pts) d²y1d²y v² dt²³
The equation is satisfied, as both sides are equal. Therefore, y(x, t) = ym exp(i(kx ± wt)) is a solution of the wave equation d²y/dx² = (1/v²) d²y/dt², where v = w/k.
To show that x(t) = xm exp(-ßt) exp(±iwt) is a solution of the equation m kx = 0, where w and β are defined by functions of m, k, and b, we need to substitute x(t) into the equation and verify that it satisfies the equation.
Starting with the equation m kx = 0, let's substitute x(t) = xm exp(-βt) exp(±iwt):
m k (xm exp(-βt) exp(±iwt)) = 0
Expanding and rearranging the terms:
m k xm exp(-βt) exp(±iwt) = 0
Since xm, exp(-βt), and exp(±iwt) are all non-zero, we can divide both sides by them:
m k = 0
The equation angular frequency reduces to 0 = 0, which is always true. Therefore, x(t) = xm exp(-βt) exp(±iwt) satisfies the equation m kx = 0.
Now let's move on to the second part of the question.
To show that y(x, t) = ym exp(i(kx ± wt)) is a solution of the wave function equation d²y/dx² = (1/v²) d²y/dt², where v = w/k, we need to substitute y(x, t) into the wave equation and verify that it satisfies the equation.
Starting with the wave equation:
d²y/dx² = (1/v²) d²y/dt²
Substituting y(x, t) = ym exp(i(kx ± wt)):
d²/dx² (y m exp(i(kx ± wt))) = (1/v²) d²/dt² (ym exp(i(kx ± wt)))
Taking the second derivative with respect to x:
-(k² ym exp(i(kx ± wt))) = (1/v²) d²/dt² (ym exp(i(kx ± wt)))
Expanding the second derivative with respect to t:
-(k² ym exp(i(kx ± wt))) = (1/v²) (ym (-w)² exp(i(kx ± wt)))
Simplifying:
-(k² ym exp(i(kx ± wt))) = (-w²/v²) ym exp(i(kx ± wt))
Dividing both sides by ym exp(i(kx ± wt)):
-k² = (-w²/v²)
Substituting v = w/k:
-k² = -w²/(w/k)²
Simplifying:
-k² = -w²/(w²/k²)
-k² = -k²
The equation is satisfied, as both sides are equal. Therefore, y(x, t) = ym exp(i(kx ± wt)) is a solution of the wave equation d²y/dx² = (1/v²) d²y/dt², where v = w/k.
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A 0.210-kg wooden rod is 1.10 m long and pivots at one end. It
is held horizontally and then released. What is the linear
acceleration of a spot on the rod that is 0.704 m from the axis of
rotation?
The linear acceleration of the spot on the rod that is 0.704 m from the axis of rotation is 49.919 m/s².
The given values are Mass of the rod = 0.210 kgLength of the rod = 1.10 m
Distance of the spot from the axis of rotation = 0.704 m
The rod is released horizontally.
This means that the rotation of the rod will be around an axis perpendicular to the rod.
Moment of inertia of a rod about an axis perpendicular to its length is given by the formula,
I=1/12ml²I = Moment of inertia of the rodm = Mass of the rodl = Length of the rod
Substitute the values in the formula and find I.I = 1/12 × 0.210 kg × (1.10 m)²= 0.0205 kg m²
Linear acceleration of a spot on the rod, a is given by the formula:
a = αrwhereα = angular acceleration of the rodr = Distance of the spot from the axis of rotation
Angular acceleration of the rod is given by the formula,τ = Iατ = τorque on the rodr = Distance of the spot from the axis of rotation
Substitute the values in the formula and find α.τ = Iαα = τ/I
The torque on the rod is due to its weight. Weight of the rod, W = mgW = 0.210 kg × 9.8 m/s² = 2.058 N
The torque on the rod is due to the weight of the rod.
It can be found as,τ = W × rτ = 2.058 N × 0.704 mτ = 1.450 Nm
Substitute the values in the formula and find α.α = τ/Iα = 1.450 Nm / 0.0205 kg m²α = 70.732 rad/s²
Substitute the values in the formula and find a.a = αr = 70.732 rad/s² × 0.704 m = 49.919 m/s²
Therefore, the linear acceleration of the spot on the rod that is 0.704 m from the axis of rotation is 49.919 m/s².
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(a) The current in a wire is 2.0 mA. In 2.0 ms. how much charge flows through a point in a wire, and how many electrons pass the point?
2.5 × 10¹³ electrons pass through the point in the wire in 2.0 ms.
Current is the rate of flow of charge, typically measured in amperes (A). One ampere is equivalent to one coulomb of charge flowing per second. For a current of 2.0 mA, which is 2.0 × 10⁻³ A, the charge that flows through a point in the wire in 2.0 ms can be calculated using the formula Q = I × t, where Q represents the charge in coulombs, I is the current in amperes, and t is the time in seconds.
By substituting the given values into the formula, we can calculate the resulting value.
Q = (2.0 × 10⁻³ A) × (2.0 × 10⁻³ s)
Q = 4.0 × 10⁻⁶ C
Therefore, 4.0 × 10⁻⁶ C of charge flows through the point in the wire in 2.0 ms. To determine the number of electrons that pass the point, we can use the formula n = Q/e, where n represents the number of electrons, Q is the charge in coulombs, and e is the charge on an electron.
Substituting the values into the formula:
n = (4.0 × 10⁻⁶ C) / (1.6 × 10⁻¹⁹ C)
n = 2.5 × 10¹³
Hence, 2.5 × 10¹³ electrons pass through the point in the wire in 2.0 ms.
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3. Which of the following statements is true concerning the electric field (E) between two oppositely charged parallel plates of very large area, separated by a small distance, both with the same magnitude of charge? A. E must be zero midway between the plates. B. E has a larger magnitude midway between the plates than at either plate. C. E has a smaller magnitude midway between the plates than at either plate. a D. E has a larger magnitude near the (-) charged plate than near the (+) charged plate. E. E has a larger magnitude near the (+) charged plate than near the (-) charged plate. F. E has a constant magnitude and direction between the plates.
The correct option for the following statement is A. E must be zero midway between the plates. What is an electric field An electric field is a vector field that is generated by electric charges or time-varying magnetic fields. An electric field is defined as the space surrounding an electrically charged object in which electrically charged particles are affected by a force.
In other words, it is a region in which a charged object exerts an electric force on a nearby object with an electric charge. A positively charged particle in an electric field will experience a force in the direction of the electric field, while a negatively charged particle in an electric field will experience a force in the opposite direction of the electric field.
The magnitude of the electric field is determined by the quantity of charge on the charged object that created the electric field.
The electric field between two oppositely charged parallel plates of very large area, separated by a small distance, both with the same magnitude of charge is uniform in direction and magnitude.
The electric field is uniform between the plates, which means that the electric field has a constant magnitude and direction between the plates.
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Learning Goal: The Hydrogen Spectrum Electrons in hydrogen atoms are in the n=4 state (orbit). They can jump up to higher orbits or down to lower orbits. The numerical value of the Rydberg constant (determined from measurements of wavelengths) is R=1.097×107 m−1. Planck's constant is h=6.626×10−34 J⋅s, the speed of light in a vacuum is c=3×108 m/s. What is the LONGEST EMITTED wavelength? Express your answer in nanometers (nm),1 nm=10−9 m. Keep 1 digit after the decimal point. emitted λlongest = nm Part B What is the energy of the Emitted photon with the LONGEST wavelength? The photon energy should always be reported as positive. Express your answer in eV,1eV=1.6⋆10−19 J. Keep 4 digits after the decimal point. What is the SHORTEST ABSORBED wavelength? Express your answer in nanometers (nm),1 nm=10−9 m. Keep 1 digit after the decimal point.
Part A: To find the longest emitted wavelength, we will use the formula:1/λ = R [ (1/n12) - (1/n22) ]Where, R = Rydberg constantn1 = 4n2 = ∞ (for longest wavelength) Substituting the values,1/λ = (1.097 × 107 m⁻¹) [ (1/42) - (1/∞2) ]On solving,λ = 820.4 nm.
Therefore, the longest emitted wavelength is 820.4 nm. Part Bathed energy of the emitted photon with the longest wavelength can be found using the formulae = hoc/λ Where, h = Planck's constant = Speed of lightλ = Longest emitted wavelength Substituting the values = (6.626 × 10⁻³⁴ J s) (3 × 10⁸ m/s) / (820.4 × 10⁻⁹ m)E = 2.411 x 10⁻¹⁹ J.
Converting the energy to eV,E = 2.411 x 10⁻¹⁹ J x (1 eV / 1.6 x 10⁻¹⁹ J)E = 1.506 eV (approx.)Therefore, the energy of the emitted photon with the longest wavelength is 1.506 eV.
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Located in phys lab of London. consider a parallel-plate capacitor made up of two conducting
plates with dimensions 12 mm × 47 mm
If the separation between the plates is 0.75 mm, what is the capacitance, in F, between them? If there is 0.25 C of charged stored on the positive plate, what is the potential, in volts, across
the capacitor which is also in London?
What is the magnitude of the electric field, in newtons per coulomb, inside this capacitor? If the separation between the plates doubles, what will the electric field be if the charge is kept
constant?
The capacitance is 0.088 μF. The Potential difference, V = 2836.36 V. The magnitude of the electric field between the plates is 3,781,818.18 V/m. After changing the separation between the plate, the new electric field will be: E = (1/2) × 3,781,818.18 V/m = 1,890,909.09 V/m.
Capacitance is defined as the ability of a system to store an electric charge. Capacitor, on the other hand, is an electronic device that has the ability to store electrical energy by storing charge on its plates. It is made up of two parallel plates separated by a distance d.
The capacitance of a parallel-plate capacitor is given by the formula: Capacitance, C = ε0A/d where ε0 is the permittivity of free space, A is the area of the plates and d is the separation between the plates. The capacitance can be found using the given values as: C = ε0A/d = 8.85 × 10-12 F/m × (0.012 m × 0.047 m)/(0.00075 m) = 0.088 μF. If there is a charge of 0.25 C stored on the positive plate, then the potential difference between the plates can be found using the formula: Potential difference, V = Q/CC = Q/V = 0.25 C/0.088 μF = 2836.36 V.
The magnitude of the electric field between the plates can be found using the formula: Electric field, E = V/d = 2836.36 V/0.00075 m = 3,781,818.18 V/m. If the separation between the plates doubles, the capacitance is halved, i.e. the new capacitance will be 0.044 μF. Since the charge is kept constant, the new potential difference will be: V = Q/CC = Q/V = 0.25 C/0.044 μF = 5681.82 V. The electric field is inversely proportional to the distance between the plates, so if the separation between the plates doubles, the electric field will be halved.
Therefore, the new electric field will be: E = (1/2) × 3,781,818.18 V/m = 1,890,909.09 V/m.
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A 3.0 kg falling rock has a kinetic energy equal to 2,430 J. What is its speed?
The speed of the falling rock can be determined by using the equation for kinetic energy: KE = 0.5 * m * v^2, the speed of the falling rock is approximately 40.25 m/s.
The kinetic energy of the rock is 2,430 J and the mass is 3.0 kg, we can rearrange the equation to solve for the speed:
v^2 = (2 * KE) / m
Substituting the given values:
v^2 = (2 * 2,430 J) / 3.0 kg
v^2 ≈ 1,620 J / kg
Taking the square root of both sides, we find:
v ≈ √(1,620 J / kg)
v ≈ 40.25 m/s
Therefore, the speed of the falling rock is approximately 40.25 m/s.
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1. (1 p) An object has a kinetic energy of 275 J and a linear momentum of 25 kg m/s. Determine the speed and mass of the object.
An object has a kinetic energy of 275 J and a linear momentum of 25 kg m/s. The speed and mass of the object is 1.136 m/s and 22 kg respectively.
To determine the speed and mass of the object, we can use the formulas for kinetic energy and linear momentum.
Kinetic Energy (KE) = (1/2) × mass (m) × velocity squared (v²)
Linear Momentum (p) = mass (m) × velocity (v)
Kinetic Energy (KE) = 275 J
Linear Momentum (p) = 25 kg m/s
From the equation for kinetic energy, we can solve for velocity (v):
KE = (1/2) × m × v²
2 × KE = m × v²
2 × 275 J = m × v²
550 J = m × v²
From the equation for linear momentum, we have:
p = m × v
v = p / m
Plugging in the given values of linear momentum and kinetic energy, we have:
25 kg m/s = m × v
25 kg m/s = m × (550 J / m)
m = 550 J / 25 kg m/s
m = 22 kg
Now that we have the mass, we can substitute it back into the equation for velocity:
v = p / m
v = 25 kg m/s / 22 kg
v = 1.136 m/s
Therefore, the speed of the object is approximately 1.136 m/s, and the mass of the object is 22 kg.
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choose corect one
13. The photoelectric effect is (a) due to the quantum property of light (b) due to the classical theory of light (c) independent of reflecting material (d) due to protons. 14. In quantum theory (a) t
The correct answer for the photoelectric effect is (a) due to the quantum property of light.
The photoelectric effect refers to the phenomenon where electrons are emitted from a material when it is exposed to light or electromagnetic radiation. It was first explained by Albert Einstein in 1905, for which he received the Nobel Prize in Physics
According to the quantum theory of light, light is composed of discrete packets of energy called photons. When photons of sufficient energy interact with a material, they can transfer their energy to the electrons in the material. If the energy of the photons is above a certain threshold, called the work function of the material, the electrons can be completely ejected from the material, resulting in the photoelectric effect.
The classical theory of light, on the other hand, which treats light as a wave, cannot fully explain the observed characteristics of the photoelectric effect. It cannot account for the fact that the emission of electrons depends on the intensity of the light, as well as the frequency of the photons.
The photoelectric effect is also dependent on the properties of the material being illuminated. Different materials have different work functions, which determine the minimum energy required for electron emission. Therefore, the photoelectric effect is not independent of the reflecting material.
So, option A is the correct answer.
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"A particle moving between the parallel plates will increase its
potential energy as it approaches the positive plate. On the other
hand, it decreases its potential as it approaches the negative
plate."
T/F
In a system of parallel plates with a constant electric field, the potential energy of a particle changes as it moves within the field, but it does not necessarily increase as it approaches the positive plate.
The potential energy of a charged particle in an electric field is given by the equation U = qV, where U is the potential energy, q is the charge of the particle, and V is the electric potential. The potential difference, or voltage, between the plates determines the change in electric potential as the particle moves within the field.
As a particle moves from the negative plate towards the positive plate, it will experience a decrease in electric potential energy if it has a positive charge (q > 0) since the electric potential increases in the direction of the electric field. Conversely, if the particle has a negative charge (q < 0), it will experience an increase in electric potential energy as it moves toward the positive plate.
Therefore, the change in the potential energy of a particle moving between parallel plates depends on the charge of the particle and the direction of its motion relative to the electric field. It is not solely determined by whether it is approaching the positive or negative plate.
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Please Help
A simple ac circuit is composed of an inductor connected across the terminals of an ac power source. If the frequency of the source is halved, what happens to the reactance of the inductor? It is unch
When the frequency of an AC power source is halved in a simple AC circuit with an inductor, the reactance of the inductor increases.
The reactance of an inductor is directly proportional to the frequency of the AC power source. Reactance is the opposition that an inductor presents to the flow of alternating current. It is determined by the formula Xl = 2πfL, where Xl is the inductive reactance, f is the frequency, and L is the inductance.
When the frequency is halved, the value of f in the formula decreases. As a result, the inductive reactance increases. This means that the inductor offers greater opposition to the flow of current, causing the current to be impeded.
Halving the frequency of the AC power source effectively reduces the rate at which the magnetic field in the inductor changes, leading to an increase in the inductive reactance. It is important to consider this relationship between frequency and reactance when designing and analyzing AC circuits with inductors.
In conclusion, when the frequency of an AC power source is halved in a simple AC circuit with an inductor, the reactance of the inductor increases, resulting in greater opposition to the flow of current.
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What is the dose in rem for each of the following? (a) a 4.39 rad x-ray rem (b) 0.250 rad of fast neutron exposure to the eye rem (c) 0.160 rad of exposure rem
The dose in rem for each of the following is:(a) 4.39 rem(b) 5.0 rem(c) 0.160 rem. The rem is the traditional unit of dose equivalent.
It is the product of the absorbed dose, which is the amount of energy deposited in a tissue or object by radiation, and the quality factor, which accounts for the biological effects of the specific type of radiation.A rem is equal to 0.01 sieverts, the unit of measure in the International System of Units (SI). The relationship between the two is based on the biological effect of radiation on tissue. Therefore:
Rem = rad × quality factor
(a) For a 4.39 rad x-ray, the dose in rem is equal to 4.39 rad × 1 rem/rad = 4.39 rem
(b) For 0.250 rad of fast neutron exposure to the eye, the dose in rem is 0.250 rad × 20 rem/rad = 5.0 rem
(c) For 0.160 rad of exposure, the dose in rem is equal to 0.160 rad × 1 rem/rad = 0.160 rem
The dose in rem for each of the following is:(a) 4.39 rem(b) 5.0 rem(c) 0.160 rem.
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Δ 1 12 Consider two parallel wires where 11 is 16.1 amps, and 12 is 29.3 amps. The location A is in the plane of the two wires and is 30.0 mm from the left wire and 13.9 mm from the right wire. Given the direction of current in each wire, what is the B-field at the location A in micro Teslas? (If the B-field points toward you, make it positive; if it points away from you, make it negative. Give answer as an integer with correct sign. Do not enter unit.)
The magnetic field (B-field) at location A is -3 micro Teslas.
To calculate the magnetic field at location A, we'll use the formula for the magnetic field created by a current-carrying wire. The formula states that the magnetic field is directly proportional to the current and inversely proportional to the distance from the wire.
For the left wire, the distance from A is 30.0 mm (or 0.03 meters), and the current is 16.1 amps. For the right wire, the distance from A is 13.9 mm (or 0.0139 meters), and the current is 29.3 amps.
Using the formula, we can calculate the magnetic field created by each wire individually. The B-field for the left wire is (μ₀ * I₁) / (2π * r₁), where μ₀ is the magnetic constant (4π × 10^(-7) T m/A), I₁ is the current in the left wire (16.1 A), and r₁ is the distance from A to the left wire (0.03 m). Similarly, the B-field for the right wire is (μ₀ * I₂) / (2π * r₂), where I₂ is the current in the right wire (29.3 A) and r₂ is the distance from A to the right wire (0.0139 m).
Calculating the magnetic fields for each wire, we find that the B-field created by the left wire is approximately -13.5 micro Teslas (pointing away from us), and the B-field created by the right wire is approximately +9.5 micro Teslas (pointing towards us). Since the B-field is a vector quantity, we need to consider the direction as well. Since the wires are parallel and carry currents in opposite directions, the B-fields will have opposite signs.
To find the net magnetic field at location A, we add the magnetic fields from both wires. (-13.5 + 9.5) ≈ -4 micro Teslas. Hence, the B-field at location A is approximately -4 micro Teslas, pointing away from us.
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Please show working out.
2. A mass of a liquid of density \( \rho \) is thoroughly mixed with an equal mass of another liquid of density \( 2 \rho \). No change of the total volume occurs. What is the density of the liquid mi
When equal masses of a liquid with density ρ and another liquid with density 2ρ are mixed, the resulting liquid mixture has a density of 4/3ρ. Thus, option A, 4/3ρ, is the correct answer.
To determine the density of the liquid mixture, we need to consider the mass and volume of the liquids involved. Let's assume that the mass of each liquid is m and the density of the first liquid is ρ.
Since the mass of the first liquid is equal to the mass of the second liquid (m), the total mass of the mixture is 2m.
The volume of each liquid can be calculated using the density formula: density = mass/volume. Rearranging the formula, we have volume = mass/density.
For the first liquid, its volume is m/ρ.
For the second liquid, since its density is 2ρ, its volume is m/(2ρ).
When we mix the two liquids, the total volume remains unchanged. Therefore, the volume of the mixture is equal to the sum of the volumes of the individual liquids.
Volume of mixture = volume of first liquid + volume of second liquid
Volume of mixture = m/ρ + m/(2ρ)
Volume of mixture = (2m + m)/(2ρ)
Volume of mixture = 3m/(2ρ)
Now, to calculate the density of the mixture, we divide the total mass (2m) by the volume of the mixture (3m/(2ρ)).
Density of mixture = (2m) / (3m/(2ρ))
Density of mixture = 4ρ/3m
Since we know that the mass of the liquids cancels out, the density of the mixture simplifies to:
Density of mixture = 4ρ/3
Therefore, the density of the liquid mixture is 4/3ρ, which corresponds to option A.
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Complete question :
A mass of a liquid of density ρ is thoroughly mixed with an equal mass of another liquid of density 2ρ. No change of the total volume occurs. What is the density of the liquid mixture? A. 4/3ρ B. 3/2ρ C. 5/3ρ D. 3ρ
How much voltage was applied to a 6.00 mF capacitor if it stores
432mJ of energy?
The voltage applied to the 6.00 mF capacitor to store 432 mJ of energy is 12 volts.
To find the voltage applied to a capacitor, you can use the formula:
Energy (E) = (1/2) * C * V^2
Where:
E = Energy stored in the capacitor
C = Capacitance
V = Voltage applied to the capacitor
In this case, the energy stored in the capacitor (E) is given as 432 mJ (millijoules), and the capacitance (C) is given as 6.00 mF (millifarads).
Let's substitute the given values into the formula and solve for V:
432 mJ = (1/2) * 6.00 mF * V^2
First, let's convert the energy and capacitance to joules and farads:
432 mJ = 0.432 J
6.00 mF = 0.006 F
Now, we can rewrite the equation:
0.432 J = (1/2) * 0.006 F * V^2
Divide both sides of the equation by (1/2) * 0.006 F:
0.432 J / [(1/2) * 0.006 F] = V^2
Simplify the left side:
0.432 J / (0.003 F) = V^2
V^2 = 144 V^2
Take the square root of both sides to solve for V:
V = √(144 V^2)
V = 12 V
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Question 7 (5 marks) A coil of 500 turns, cach turn is circular of radius 22 mm, is kept in a constant magnetic field of 20 T so that the plane area of the coil is perpendicular to the magnetic field lines. In 0,66 sec the coil is pulled out of the field. The total resistance of the coil is 50 Ohm. Find the average induced current as the coil is pulled out of the field.
To calculate the average induced current as the coil is pulled out of the field, we can use Faraday's law of electromagnetic induction, which states that the induced electromotive force (emf) is equal to the rate of change of magnetic flux.
The magnetic flux (Φ) through a coil can be calculated by multiplying the magnetic field strength (B) by the area (A) of the coil and the cosine of the angle (θ) between the magnetic field lines and the plane of the coil:
Φ = B * A * cos(θ)
Given that the magnetic field strength (B) is 20 T, the area (A) of each turn is π * (0.022 m)^2, and the angle (θ) between the magnetic field lines and the plane of the coil is 90 degrees (since it is perpendicular), we can calculate the magnetic flux through one turn of the coil:
Φ = 20 T * π * (0.022 m)^2 * cos(90°) = 0.03094 Wb
The rate of change of magnetic flux (dΦ/dt) is equal to the change in flux divided by the time taken (0.66 s):
dΦ/dt = (0.03094 Wb - 0 Wb) / 0.66 s = 0.04685 Wb/s
The induced electromotive force (emf) can be calculated by multiplying the rate of change of magnetic flux by the number of turns in the coil (N):
emf = N * dΦ/dt = 500 * 0.04685 V = 23.43 V
Finally, we can calculate the average induced current (I) using Ohm's law (V = I * R), where R is the total resistance of the coil (50 Ω):
I = emf / R = 23.43 V / 50 Ω ≈ 0.469 A
Therefore, the average induced current as the coil is pulled out of the field is approximately 0.469 A.
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Two radio antennas separated by d = 288 m as shown in the figure below simultaneously broadcast identical signals at the same wavelength. A car travels due north along a straight line at position x = 1140 m from the center point between the antennas, and its radio receives the signals. Note: Do not use the small-angle approximation in this problem.
Two antennas, one directly above the other, are separated by a distance d. A horizontal dashed line begins at the midpoint between the speakers and extends to the right. A point labeled O is a horizontal distance x from the line's left end. A car is shown to be a distance y directly above point O. An arrow extends from the car, indicating its direction of motion, and points toward the top of the page.
(a) If the car is at the position of the second maximum after that at point O when it has traveled a distance y = 400 m northward, what is the wavelength of the signals?
The wavelength of the signals broadcasted by the two antennas can be determined by finding the distance between consecutive maximum points on the path of the car, which is 400 m northward from point O.
To find the wavelength of the signals, we need to consider the path difference between the signals received by the car from the two antennas.
Given that the car is at the position of the second maximum after point O when it has traveled a distance of y = 400 m northward, we can determine the path difference by considering the triangle formed by the car, point O, and the two antennas.
Let's denote the distance from point O to the car as x, and the separation between the two antennas as d = 288 m.
From the geometry of the problem, we can observe that the path difference (Δx) between the signals received by the car from the two antennas is given by:
Δx = √(x² + d²) - √(x² + (d/2)²)
Simplifying this expression, we get:
Δx = √(x² + 288²) - √(x² + (288/2)²)
= √(x² + 82944) - √(x² + 41472)
Since the car is at the position of the second maximum after point O, the path difference Δx should be equal to half the wavelength of the signals, λ/2.
Therefore, we can write the equation as:
λ/2 = √(x² + 82944) - √(x² + 41472)
To find the wavelength λ, we can multiply both sides of the equation by 2:
λ = 2 * (√(x² + 82944) - √(x² + 41472))
Substituting the given value of y = 400 m for x, we can calculate the wavelength of the signals.
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An RL circuit is composed of a 12 V battery, a 6.0 H inductor and a 0.050 Ohm resistor. The switch is closed at t=0 The time constant is 2.0 minutes and after the switch has been closed a long time the voltage across the inductor is 12 V. The time constant is 1.2 minutes and after the switch has been closed a long time the voltage across the inductor is zero. The time constant is 2.0 minutes and after the switch has been closed a long time the voltage across the inductor is zero
The time constant is 1.2 minutes and after the switch has been closed a long time the voltage across the inductor is 12 V.
The RL circuit described has a time constant of 1.2 minutes, and after the switch has been closed for a long time, the voltage across the inductor is 12 V.
The time constant (τ) of an RL circuit is determined by the product of the resistance (R) and the inductance (L) and is given by the formula τ = L/R. In this case, the time constant is 1.2 minutes.
When the switch is closed, current begins to flow through the circuit. As time progresses, the current increases and approaches its maximum value, which is determined by the battery voltage and the circuit's total resistance.
In an RL circuit, the voltage across the inductor (V_L) can be calculated using the formula V_L = V_0 * (1 - e^(-t/τ)), where V_0 is the initial voltage across the inductor, t is the time, and e is the base of the natural logarithm.
Given that the voltage across the inductor after a long time is 12 V, we can set V_L equal to 12 V and solve for t to determine the time it takes for the voltage to reach this value. The equation becomes 12 = 12 * (1 - e^(-t/τ)).
By solving this equation, we find that t is equal to approximately 3.57 minutes. Therefore, after the switch has been closed for a long time, the voltage across the inductor in this RL circuit reaches 12 V after approximately 3.57 minutes.
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2. Sodium Chloride is found easily in nature. Write the electron configuration of Nall and C1¹7.
The electron configuration of Na is 1s² 2s² 2p⁶ 3s¹, and the electron configuration of Cl is 1s² 2s² 2p⁶ 3s² 3p⁵. Sodium (Na) has 11 electrons, with one electron in its outermost shell, while chlorine (Cl) has 17 electrons, with seven electrons in its outermost shell.
The electron configuration of an atom represents the arrangement of its electrons in different energy levels or shells. In the case of sodium (Na), it has an atomic number of 11, indicating that it has 11 electrons. The electron configuration of Na is 1s² 2s² 2p⁶ 3s¹.
This means that the first energy level (1s) contains two electrons, the second energy level (2s) contains two electrons, the second energy level (2p) contains six electrons, and the third energy level (3s) contains one electron.
Chlorine (Cl) has an atomic number of 17, which means it has 17 electrons. The electron configuration of Cl is 1s² 2s² 2p⁶ 3s² 3p⁵. Similar to sodium, the first energy level (1s) contains two electrons, the second energy level (2s) contains two electrons, and the second energy level (2p) contains six electrons.
These electron configurations reveal the number and arrangement of electrons in the outermost shell, also known as the valence shell. For Na, its valence electron is in the 3s orbital, and for Cl, its valence electrons are in the 3s and 3p orbitals. These valence electrons are involved in chemical reactions, such as the formation of ionic compounds like sodium chloride (NaCl).
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A horizontal aluminum rod 2.8 cm in diameter projects 6.0 cm from a wall. A 1500 kg object is suspended from the end of the rod. The shear modulus of aluminum is 3.0.1010 N/m2. Neglecting the rod's mass, find (a) the shear stress on the rod and (b) the vertical deflection of the end of the rod. (a) Number i Units (b) Number i Units
Torque multiplication is the ability of a torque converter to increase the torque that is applied to the drive wheels of a vehicle. This is done by using the centrifugal force of the rotating impeller to drive the turbine.
A torque converter is a fluid coupling that is used to transmit power from the engine to the drive wheels of an automatic transmission. It consists of three main parts: the impeller, the turbine, and the stator.
The impeller is driven by the engine and it spins the fluid inside the torque converter. The turbine is located on the other side of the fluid and it is spun by the fluid. The stator is located between the impeller and the turbine and it helps to direct the flow of fluid.
When the impeller spins, it creates centrifugal force that flings the fluid outwards. This fluid then hits the turbine and causes it to spin. The turbine is connected to the drive wheels, so when it spins, it turns the drive wheels.
The amount of torque multiplication that is produced by a torque converter depends on a number of factors, including the size of the impeller, the size of the turbine, and the speed of the impeller.
Typically, a torque converter can multiply the torque from the engine by a factor of 1.5 to 2.5. This means that if the engine is producing 100 lb-ft of torque, the torque converter can deliver up to 250 lb-ft of torque to the drive wheels.
Torque multiplication is a valuable feature in an automatic transmission because it allows the engine to operate at a lower RPM while the vehicle is accelerating. This helps to improve fuel economy and reduce emissions.
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What must be the electric field between two parallel plates
there is a potential difference of 0.850V when they are placed
1.33m apart?
1.13N/C
0.639N/C
1.56N/C
0.480N/C
The electric field between the two parallel plates when there is a potential difference of 0.850 V and the plates are placed 1.33 m apart is 0.639 N/C.
To calculate the electric field between two parallel plates, we can use the formula:
E=V/d
Where,
E is the electric field,
V is the potential difference between the plates, and
d is the distance between the plates.
According to the question, the potential difference between the two parallel plates is 0.850 V, and the distance between them is 1.33 m. We can substitute these values in the formula above to find the electric field:E = V/d= 0.850 V / 1.33 m= 0.639 N/C
Since the units of the answer are in N/C, we can conclude that the electric field between the two parallel plates when there is a potential difference of 0.850 V and the plates are placed 1.33 m apart is 0.639 N/C. Therefore, the correct option is 0.639N/C.
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