RL Circuits MCQ Questions & Answers | Electrical Engineering Page-3 section-1

21.
To increase the current in a series RL circuit, the frequency

A. Should be increased

B. Should be decreased

C. Should be constant

D. Cannot be determined without values

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22.
When the frequency is decreased, the impedance of a parallel RL circuit Increases

A. True

B. False

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23.
The resistor voltage in an RL circuit is always out of phase with the current.

A. True

B. False

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24.
When the frequency of the voltage applied to a series RL circuit is increased, the phase angle

A. Decreases

B. Increases

C. Does not change

D. Cannot be determined without values

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25.
The impedance of an RL circuit varies inversely with frequency.

A. True

B. False

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26.
Which of the following power factors results in less energy loss in an RL circuit?

A. 1

B. 0.8

C. 0.4

D. 0.2

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27.
A 470 Ω resistor and a 200 mH coil are in parallel. Both components are across a 1.5 kHz ac source. The total admittance of the circuit, in polar form, is

A. 12.60 ∠-76° mS

B. 12.18 ∠76° mS

C. 218 ∠-76° mS

D. 12.18 ∠-76° mS

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28.
In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is

A. 6 A

B. 424 mA

C. 4.24 A

D. 42.4 A

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29.
A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.

A. True

B. False

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RL Circuits MCQ Questions & Answers | Electrical Engineering

21. To increase the current in a series RL circuit, the frequency

Answer & Solution

22. When the frequency is decreased, the impedance of a parallel RL circuit Increases

Answer & Solution

23. The resistor voltage in an RL circuit is always out of phase with the current.

Answer & Solution

24. When the frequency of the voltage applied to a series RL circuit is increased, the phase angle

Answer & Solution

25. The impedance of an RL circuit varies inversely with frequency.

Answer & Solution

26. Which of the following power factors results in less energy loss in an RL circuit?

Answer & Solution

27. A 470 Ω resistor and a 200 mH coil are in parallel. Both components are across a 1.5 kHz ac source. The total admittance of the circuit, in polar form, is

Answer & Solution

28. In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is

Answer & Solution

29. A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.

Answer & Solution

21.
To increase the current in a series RL circuit, the frequency

22.
When the frequency is decreased, the impedance of a parallel RL circuit Increases

23.
The resistor voltage in an RL circuit is always out of phase with the current.

24.
When the frequency of the voltage applied to a series RL circuit is increased, the phase angle

25.
The impedance of an RL circuit varies inversely with frequency.

26.
Which of the following power factors results in less energy loss in an RL circuit?

27.
A 470 Ω resistor and a 200 mH coil are in parallel. Both components are across a 1.5 kHz ac source. The total admittance of the circuit, in polar form, is

28.
In a parallel RL circuit, there are 3 A rms in the resistive branch and 3 A rms in the inductive branch. The total rms current is

29.
A power factor of 1 indicates a purely reactive circuit, and a power factor of 0 indicates a purely resistive circuit.