Electrical Engineering - Capacitors

Exercise :: Capacitors - General Questions

11. 

A 4.7 M resistor is in series with a 0.015 F capacitor. The combination is across a 12 V source. How long does it take the capacitor to fully charge?

A. 35 ms
B. 352 ms
C. 3.5 s
D. 70.5 ms

Answer: Option B

Explanation:

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12. 

A sine wave voltage is applied across a capacitor. When the frequency of the voltage is decreased, the current

A. increases
B. remains constant
C. decreases
D. ceases

Answer: Option C

Explanation:

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13. 

Of the following capacitors, which one has the highest dielectric constant?

A. air
B. mica
C. glass
D. paper

Answer: Option C

Explanation:

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14. 

A 0.01 F capacitor equals how many picofarads?

A. 100 pF
B. 1,000 pF
C. 10,000 pF
D. 100,000 pF

Answer: Option C

Explanation:

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15. 

A 12 kHz voltage is applied to a 0.33 F capacitor, and 200 mA of rms current is measured. What is the value of the voltage?

A. 8 V
B. 80 V
C. 80 mV
D. 800 mV

Answer: Option A

Explanation:

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