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Exam 9: Capacitors

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Question 41

Multiple Choice

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If a 22 µF capacitor is connected to a 15 V 400 Hz source, its current equals .

A) 18.1 mA
B) 829 mA
C) 1.81 A
D) 55 mA

E) C) and D)
F) None of the above

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Question 42

Multiple Choice

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If a 0.047 µF, 0.047 µF and 0.47 µF capacitor are connected in series across a 25 V source, the total capacitance equals _ and each 0.047 µF capacitor drops .

A) 0.022 µF, 11.9 V
B) 0.022 µF, 25 V
C) 0.564 µF, 11.9 V
D) 0.564 µF, 1.2 V

E) B) and C)
F) All of the above

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Question 43

Multiple Choice

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If the dc working voltage of a capacitor is 100 V, the dielectric must withstand .

If an uncharged capacitor, a resistor, a switch and a 12 V battery are connected in series, what is the voltage across the capacitor after it is fully charged?

Leakage through a capacitor is undesirable.

What is the small amount of power lost in a capacitive circuit due to the internal resistance of the capacitors?

How long will it take a 0.047 µF capacitor to fully charge through a 100 kΩ resistor?

In a transistor amplifier the input ac signal and the output of the amplifier must be connected in a way that not does affect the dc bias voltage. This is accomplished by using a(n) capacitor.

Efficient filtering is directly related to RC time constant.