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RL Circuits

RL Circuits
If a load is purely inductive and the reactive power is 12 VAR, the apparent power is

24 VA
0 VA
6 VA
12 VA

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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

1200Ω
1526Ω
152.6Ω
942Ω

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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

doubled
decreased
not a factor
increased

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

decreases
increases
remains constant
is not a factor

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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
200Ω
55.15Ω
90Ω

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RL Circuits
Referring to Problem 23, the reactive power is

100 mVAR
6.76 mVAR
10 mVAR
148 mVAR

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