Exercise: Capacitors

Questions for: Capacitors

What is the capacitance of the circuit shown in the given circuit?

A:
0.066 mu.gifF
B:
0.9 mu.gifF
C:
65.97 pF
D:
900 pF
Answer: A
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If a current of 40 mA flows through a series circuit consisting of a 0.4 F capacitor and a resistor in series with a 4 kHz, 40 Vac source, what is the total circuit impedance?
A:
10 omega.gif
B:
100 omega.gif
C:
1 k omega.gif
D:
1 M omega.gif
Answer: C
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After a capacitor has charged for 1 tc, what percentage of current remains in the resistor?
A:
63.2
B:
36.8
C:
13.5
D:
5.0
Answer: B
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With a 500 kHz signal source, what would be the value of a capacitor yielding a capacitive reactance of 1 k omega.gif?
A:
318 pF
B:
2 nF
C:
3.18 F
D:
2 F
Answer: A
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As a capacitor is being charged, the voltage across its terminals will:
A:
increase
B:
decrease
C:
remain the same
D:
oppose the source
Answer: A
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