Electrical Engineering - RL Circuits

Exercise :: RL Circuits - General Questions

16. 

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

Answer: Option D

Explanation:

No answer description available for this question. Let us discuss.

17. 

A 3.3 k resistor and a 120 mH coil are in parallel. Both components are across a 2 kHz, 12 V ac source. The total current in the circuit is

A. 8.74 mA
B. 874 mA
C. 874 A
D. 8.74 A

Answer: Option A

Explanation:

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18. 

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

Answer: Option B

Explanation:

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19. 

If a load is purely inductive and the reactive power is 12 VAR, the apparent power is

A. 0 VA
B. 12 VA
C. 6 VA
D. 24 VA

Answer: Option B

Explanation:

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20. 

If the frequency is halved and the resistance is doubled, the impedance of a series RL circuit

A. doubles
B. halves
C. remains constant
D. cannot be determined without values

Answer: Option D

Explanation:

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