Electrical Engineering - RL Circuits

Exercise :: RL Circuits - General Questions
11.
A 140 resistor is in parallel with an inductor having 60 inductive reactance. Both components are across a 12 V ac source. The magnitude of the total impedance is

Answer: Option B

Explanation:

12.
When the frequency of the voltage applied to a series RL circuit is decreased, the impedance

A.
decreases B.
increases C.
does not change D.
cannot be determined without values

Answer: Option A

Explanation:

13.
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: Option C

Explanation:

15.
When the resistor voltage in a series RL circuit becomes less than the inductor voltage, the phase angle

A.
increases B.
decreases C.
is not affected D.
cannot be determined

Answer: Option A

Explanation: