Exercise: Rc Circuits

Questions for: Rc Circuits

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: A
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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: A
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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: A
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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: B
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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: C
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