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RC Circuits

RC Circuits
A 6 kHz sinusoidal voltage is applied to a series RC circuit. The frequency of the voltage across the resistor is

0 Hz
6 kHz
18 kHz
12 kHz

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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?

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

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RC Circuits
A 12 kΩ resistor is in series with a 0.02 μF capacitor across a 1.2 kHz ac source. If the current is expressed in polar form as I = 0.3 angle 0° mA, what is the source voltage expressed in polar form?

0.411 V
4.11 V
45.6 V
411.3 V

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RC Circuits
A positive angle of 30° is equivalent to a negative angle of

–330°
–60°
–30°
–180°

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RC Circuits
What is the value of the hypotenuse of a right triangle whose sides are 12 and 18?

3.46
4.24
2.16
21.63

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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

19.52 W
25 W
275 W
195.2 W

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