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RC CIRCUITS

RC Circuits
A resistor and a capacitor are in series across a 20 V ac source. Circuit impedance is 4.33 k. Current flow in the circuit is

4.6 mA
92 mA
460 mA
9.2 mA

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RC Circuits
For a certain load, the true power is 150 W and the reactive power is 125 VAR. The apparent power is

25 W
275 W
195.2 W
19.52 W

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RC Circuits
When the frequency of the voltage applied to a series RC circuit is increased, the phase angle

remains the same
becomes erratic
increases
decreases

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RC Circuits
In a series RC circuit, when the frequency and the resistance are halved, the impedance

is reduced to one-fourth
cannot be determined without values
is halved
doubles

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RC Circuits
A 2 k resistor is in series with a 0.015 F capacitor across a 15 kHz ac source. What is the magnitude of the total impedance and the phase angle?

2121 and θ = –19.5°
73.4 and θ = –19.5°
734 and θ = –38.9°
707 and θ = –19.5°

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