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RC Circuits

RC Circuits
What is the angular difference between +j4 and –j4?

30°
270°
180°
90°

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

–30°
–60°
–330°
–180°

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RC Circuits
In a series RC circuit, 12 V(rms) is measured across the resistor and 15 V(rms) is measured across the capacitor. The rms source voltage is

27 V
1.9 V
3 V
19.2 V

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

decreases
decreases to zero
increases
does not change

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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
45.6 V
4.11 V
411.3 V

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RC Circuits
A 120Ω resistor is in parallel with a capacitor with a capacitive reactance of 40 Ω. Both components are across a 12 V ac source. What is the magnitude of the total impedance?

14400Ω
3.7Ω
4800Ω
37.9Ω

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