- A. Should be increased
- B. Should be decreased
- C. Should be constant
- D. Cannot be determined without values
RL Circuits
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To increase the current in a series RL circuit, the frequency_____.
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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
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In an RL circuit, the impedance is determined by both the resistance and the inductive reactance combined.
- A. True
- B. False
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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
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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
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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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When the frequency is decreased, the impedance of a parallel RL circuit_____.
- A. Increases
- B. Decreases
- C. Remains constant
- D. Is not a factor
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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
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In an RL circuit, part of the power is resistive and part is reactive.
- A. True
- B. False
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When the frequency is decreased, the impedance of a parallel RL circuit Increases_____.
- A. True
- B. False