Electrical Engineering - RC Circuits

Exercise :: RC Circuits - General Questions

6. 

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

A. 0 Hz
B. 12 kHz
C. 6 kHz
D. 18 kHz

Answer: Option C

Explanation:

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7. 

The voltages in Problem 4 are measured at a certain frequency. To make the capacitor voltage greater than the resistor voltage, the frequency

A. must be increased
B. must be decreased
C. is held constant
D. has no effect

Answer: Option B

Explanation:

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8. 

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

A. first quadrant
B. second quadrant
C. third quadrant
D. fourth quadrant

Answer: Option A

Explanation:

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9. 

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

A. increases
B. decreases
C. does not change
D. decreases to zero

Answer: Option A

Explanation:

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10. 

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

A. 129
B. 12.9
C. 167
D. 73

Answer: Option A

Explanation:

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