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

decreased
doubled
increased
not a factor

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

cannot be determined without values
doubles
remains constant
halves

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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
0.564
6.76

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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

90Ω
200Ω
5.51Ω
55.15Ω

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RL Circuits
A 47Ω resistor is in series with an inductive reactance of 120Ω across an ac source. The impedance, expressed in polar form, is

120 angle 68.6°
47 angle 68.6°
129 angle 31.4°
129 angle 68.6°

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