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RL Circuits

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

0.8
0.2
1
0.4

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RL Circuits
A 140Ω 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

5.51Ω
90Ω
200Ω
55.15Ω

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RL Circuits
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

2 V
20 V
26.0 V
18.4 V

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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

55.7
0.564
6.76
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
874 mA
8.74 mA
8.74 A

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RL Circuits
The voltages in Problem 5 are measured at a certain frequency. To make the resistor voltage less than the inductor voltage, the frequency is

not a factor
decreased
increased
doubled

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