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

remains constant
doubles
cannot be determined without values
halves

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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
8.74 A
874 mA

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RL Circuits
When the frequency is decreased, the impedance of a parallel RL circuit

remains constant
increases
decreases
is not a factor

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

is not affected
decreases
cannot be determined
increases

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