Electrical Engineering - Capacitors

Exercise :: Capacitors - General Questions

6. 

A 0.47 F capacitor is across a 2 kHz sine wave signal source. The capacitive reactance is

A. 170
B. 17
C. 0.000169
D. 1.7

Answer: Option A

Explanation:

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7. 

Four 0.15 F capacitors are in parallel. The total capacitance is

A. 0.15 F
B. 0.30 F
C. 0.6 F
D. 0.8 F

Answer: Option C

Explanation:

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8. 

Which of the following capacitors is polarized?

A. mica
B. ceramic
C. plastic-film
D. electrolytic

Answer: Option D

Explanation:

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9. 

A capacitor of 2,000 pF is greater than

A. 0.02 F
B. 0.002 F
C. 0.0002 F
D. 0.0000002 F

Answer: Option C

Explanation:

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10. 

A 220 resistor is in series with a 2.2 F capacitor. The time constant is

A. 48 s
B. 480 s
C. 2.42 s
D. 24 s

Answer: Option B

Explanation:

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