# RL Circuits

• ## 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
Explanation:

No answer description available for this question

• ## A 1.2 kΩ resistor is in series with a 15 mH coil across a 10 kHz ac source. The magnitude of the total impedance is_____.

• A. 152.6 Ω
• B. 1,526 Ω
• C. 1,200 Ω
• D. 942 Ω
Explanation:

No answer description available for this question

• ## In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.

• A. True
• B. False
Explanation:

No answer description available for this question

• ## In a series RL circuit, 12 V rms is measured across the resistor, and 14 V rms is measured across the inductor. The peak value of the source voltage is_____.

• A. 18.4 V
• B. 26.0 V
• C. 2 V
• D. 20 V
Explanation:

Erms = √VL2 + VR2
⇒ Erms = √122 + 142 = √340V
Emax = Erms√2
​Emax = √680V
⇒ Emax = 26.0V

• ## A 1.5 kΩ resistor and a coil with a 2.2 kΩ inductive reactance are in series across an 18 V ac source. The power factor is_____.

• A. 564
• B. 0.564
• C. 6.76
• D. 55.7
Explanation:

No answer description available for this question

• ## 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
Explanation:

No answer description available for this question

• ## When the frequency is decreased, the impedance of a parallel RL circuit_____.

• A. Increases
• B. Decreases
• C. Remains constant
• D. Is not a factor
Explanation:

No answer description available for this question

• ## 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
Explanation:

No answer description available for this question

• ## In an RL circuit, part of the power is resistive and part is reactive.

• A. True
• B. False
Explanation:

No answer description available for this question

• A. True
• B. False