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RL Circuits

RL Circuits
Referring to Problem 23, the reactive power is

10 mVAR
148 mVAR
6.76 mVAR
100 mVAR

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

remains constant
halves
cannot be determined without values
doubles

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RL Circuits
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

152.6Ω
1200Ω
1526Ω
942Ω

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

0.4
0.8
0.2
1

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RL Circuits
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

564
55.7
6.76
0.564

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RL Circuits
A 3.3 kΩ 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

874 A
8.74 mA
874 mA
8.74 A

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