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RC Circuits

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

–330°
–180°
–30°
–60°

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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?

411.3 V
0.411 V
45.6 V
4.11 V

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RC Circuits
When the frequency of the source voltage decreases, the impedance of a parallel RC circuit

does not change
decreases
increases
decreases to zero

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RC Circuits
A 47Ω resistor and a capacitor with a capacitive reactance of 120 are in series across an ac source. What is the circuit impedance, Z?

129Ω
167Ω
12.9Ω
73Ω

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RC Circuits
In the complex plane, the number 4 + j3 is located in the

fourth quadrant
first quadrant
second quadrant
third quadrant

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

6 kHz
0 Hz
12 kHz
18 kHz

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