Answer:
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applications of fleming hand rule
Answer:
Fleming hand rule represents the direction of current in a generator's windings and induced current as a conductor is attached to a circuit such that it moves in a magnetic field.
Explanation:
Fleming hand rule represents the direction of current in a generator's windings and induced current as a conductor is attached to a circuit such that it moves in a magnetic field.
Fleming hand rule is used in the case of electric motors and electric generators.
Fleming hand rule is used to determine the following:
1. Direction of torque
2. Angular velocity
3. Angular acceleration
A heat engine receives 1000kJ/s of heat from a high temperature source at 600◦C and rejects heat to a cold temperature sink at 20◦C a. What is the thermal efficiency of this engine? b. What is the power delivered by the engine in watts? c. At what rate is heat rejected to the cold temperature sink?
Answer:
(A) the thermal efficiency of this engine is 66.44 %
(B) the power delivered by the engine in watts is 664,400 W
(C) The rate at which heat is rejected to the cold temperature sink is 335.6 kJ/s.
Explanation:
Given;
Input Heat received by the engine, [tex]P_{in}[/tex] = 1000 kJ/s
hot temperature, [tex]T_H[/tex] = 600 ⁰C = 600 + 273 = 873 K
cold temperature, [tex]T_C[/tex] = 20 ⁰C = 20 + 273 = 293 K
(A) the thermal efficiency of this engine;
[tex]\eta = 1 - \frac{T_C}{T_H} \\\\\eta = 1 - \frac{293}{873} \\\\\eta = 1 - 0.3356\\\\\eta = 0.6644 = 66.44 \%[/tex]
(B) the power delivered by the engine in watts;
[tex]P = \eta P_{in}\\\\P = 0.6644 \times \ 1000kJ/s \ \times \ \frac{1\ kW}{1\ kJ/s} \\\\P = 664.4 \ kW \\\\P = 664,400 \ W[/tex]
(C) The rate at which heat is rejected to the cold temperature sink;
[tex]Q_C = Q_H(1-\eta)\\\\Q_C = 1000\ kJ/s(1-0.6644)\\\\Q_C = 335.6 \ kJ/s[/tex]
An inductor is energized as in the circuit of Fig. 2-4a. The circuit has L 10 mH and VCC 14 V. (a) Determine the required on time of the switch such that the peak energy stored in the inductor is 1.2 J. (b) Select a value for R such that the switching cycle can be repeated every 20 ms. Assume the switch and the diode are ideal.
Answer:
A) 11.1 ms
B) 5.62 Ω
Explanation:
L ( inductance ) = 10 mH
Vcc = 14V
A) determine the required on time of the switch such that the peak energy stored in the inductor is 1.2J
first calculate for the current ( i ) using the equation for energy stored in an inductor hence
i = [tex]\sqrt{\frac{2W}{L} }[/tex] ----- ( 1 )
where : W = 1.2j , L = 10 mH
Input values into equation 1
i = 15.49 A
Now determine the time required with expression below
i( t ) = 15.49 A
L = 10 mH, Vcc = 14
hence the time required ( T-on ) = 11.1 ms
attached below is detailed solution
B) select the value of R such that switching cycle can be repeated every 20 ms
using the expression below
τ = [tex]\frac{L}{R}[/tex] ---- ( 2 )
but first we will determine the value of τ
τ = t-off / 5 time constants
= (20 - 11.1 ) / 5 = 1.78 ms
Back to equation 2
R = L / τ
= (10 * 10^-3) / (1.78 * 10^-3)
= 5.62 Ω
HURRY :)) In low light, it's _____ to see details, colors, and distant objects. FYI it's ed drivers!!!! A. Easier B. Harder C. Just as easy D. Impossible
Answer:
harder
Explanation:
Answer:
light
Explanation:
1. Technician A says an automotive computer can scan its input and output circuits to detect incorrect voltage problems. Technician B says an automotive computer can scan its input and output circuits to detect an incorrect resistance problem. Who is right? (A) A only. (B) B only. (C) Both A and B. (D) Neither A nor B.
In the given case, Technician B is right, as according to Technician B, an automobile computer may scan its input and output circuits for an improper resistance problem.
Who is Technician?A technician is a worker in a technological sector who is skilled in the appropriate skill and technique and has a practical comprehension of the theoretical concepts.
We also require professionals that have been adequately trained to work on, repair, and maintain the equipment. Machines that receive proper care will work more smoothly, increasing productivity on the job site while also helping to keep personnel safe.
A technician is a professional worker who install, fixes, replaces, and serves many sorts of equipment and systems. A technician spends his or her day doing various duties, depending on the situation, such as assessing issues, executing tests, and fixing equipment.
Therefore, option B is correct.
Learn more about the Technician, refer to:
https://brainly.com/question/14290207
#SPJ5
Technician A says that narrow valve seats exert a higher force on the seat area. Technician B says that if intake and exhaust valve springs are of equal pressure, then the larger valve must have a narrower seat in order to have the same seating pressure as the smaller valve. Who is right?
a. Technician A only
b. Technician B only
c. Both A and B
d. Neither A nor B
Explanation:
I think both are correct.
Narrow seats have less area, therefore, given the same pressure the narrow seats will have greater force.
If the springs are of equal pressure, the larger valve must have narrower seats such that the seat AREA is the same between the two valves. If the area is the same and the pressure is the same, the force will be the same.
what is the relationship of waste management and bioremediation?
Answer:
In the simplest terms, bioremediation is a waste management process using live organisms to neutralize or remove harmful pollutants from contaminated areas. Bioremediation is an environmental science that amplifies natural biological actions to remedy or remediate polluted groundwater and contaminated soil.
Explanation:
In the simplest terms, bioremediation is a waste management process using live organisms to neutralize or remove harmful pollutants from contaminated areas. Bioremediation is an environmental science that amplifies natural biological actions to remedy or remediate polluted groundwater and contaminated soil.
What musical form do you hear in Candle in the Wind?
Tech A says that radial ply tires have much more flexible sidewalls than bias-ply tires because of their construction. Tech B says that bias-ply tires have a more durable construction than radial tires. Who is correct?
Answer:
Tech A and Tech B are correct
Explanation:
Tech A is correct because radial ply tires have more flexible sidewalls than radial tires due to the fact that radial tires make use of two or more layers of casing piles and are thus not much flexible.
Also, tech B is correct because bias-ply tires typically have more durable construction than radial tires
During a storm, gage station A was inoperative but the surrounding stations, B, C, and D, recorded rainfall of 5.2, 4.5, and 6.1 in., respectively. The average annual precipitation for stations A, B, C, and D are 48, 53, 59, and 67 in., respectively. Estimate the storm precipitation for station A.
Answer:
4.247 in
Explanation:
Precipitation at A is P_a
similarly at P_b= 5.2 in, P_c= 4.5 in and P_d= 6.1 in
Normal annual rainfall at station A, B, C, D are
N_a = 48 in, N_b= 53, N_c= 59 in and N_d= 67 in
From the formula we have
P_a/N_a = 1/3( P_b/N_b+P_c/N_c+P_d/N_d)
⇒ P_a = 48/3(5.2/53+4.5/59+6.1/67)
P_a= 16×0.2654 = 4.247 in
Zack's new home is progressing well, and the foundation work is finished. The general contractor stops by Zack's present home to let him know that the lumber order will be dropped off in two days. Almost as a side comment, the contractor asks if Zack has decided what he wants for wall sheathing. Zack says he is not sure what would be best and asks for a recommendation. What do you think the contractor will offer as options? Which option would be best?
Answer:
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Technician A says that in a circuit that has 3 Ohms of resistance and operates on 12 volts, the amperage must be 4 amps. Technician B says that in a circuit has 3 Ohms of resistance and operates on 24 volts, the amperage must be 12 amps. Who is correct?
The technician that gave the correct statement is Technician A
Determination of the current in the circuit for technician AFrom the question given above, the following data were obtained:
Resistance (R) = 3 OhmsVoltage (V) = 12 VCurrent (I) =?V = IR
12 = I × 3
Divide both side by 3
I = 12 / 3
I = 4 A
Thus, technician A is correct.
Determination of the current in the circuit for technician BFrom the question given above, the following data were obtained:
Resistance (R) = 3 OhmsVoltage (V) = 24 VCurrent (I) =?V = IR
24 = I × 3
Divide both side by 3
I = 24 / 3
I = 8 A
Thus, technician B is wrong as the current in the circuit is 8 A and not 12 A.
From the calculations made above, we can conclude that technician A is correct.
Learn more about ohm's law:
https://brainly.com/question/104895