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Electrical Engineering
5 followers study24x7 23 Dec 2024 12:03 PM study24x7 study24x7

When the voltage across a capacitor is tripled, the stored charge

A

triples

B

is cut to one-third

C

stays the same

D

doubles

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Electrical Engineering
5 followers study24x7 23 Dec 2024 12:02 PM study24x7 study24x7

An uncharged capacitor and a 1 kΩ resistor are connected in series with a switch and a 6 V battery. At the instant the switch is closed, the voltage across the capacitor is

A

6 V

B

3 V

C

2 V

D

0 V

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Electrical Engineering
5 followers study24x7 20 Dec 2024 10:31 AM study24x7 study24x7

Two 0.68 μ F capacitors are connected in series across a 10 kHz sine wave signal source. The total capacitive reactance is

A

46.8 Ω

B

4.68 Ω

C

23.41 Ω

D

11.70 Ω

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Electrical Engineering
5 followers study24x7 20 Dec 2024 10:30 AM study24x7 study24x7

When the plate area of a capacitor increases,

A

the capacitance increases

B

the capacitance decreases

C

the capacitance is unaffected

D

the voltage it can withstand increases.

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Electrical Engineering
5 followers study24x7 20 Dec 2024 10:29 AM study24x7 study24x7

A 2 μ F, a 4 μ F, and a 10 μ F capacitor are connected in series. The total capacitance is less than

A

2 μ F

B

4 μ F

C

10 μ F

D

1.5 μ F

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Electrical Engineering
5 followers study24x7 19 Dec 2024 01:08 PM study24x7 study24x7

A 330 pF capacitor and a 220 pF capacitor are each connected across a 6 V dc source. The voltage across the 330 pF capacitor is

A

3 V

B

6 V

C

4 V

D

0 V

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Electrical Engineering
5 followers study24x7 19 Dec 2024 01:04 PM study24x7 study24x7

Two series capacitors (one 2 μ F, the other of unknown value) are charged from a 24 V source. The 2 μ F capacitor is charged to 16 V and the other to 8 V. The value of the unknown capacitor is

A

1 μ F

B

2 μ F

C

4 μ F

D

8 μ F

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Electrical Engineering
5 followers study24x7 19 Dec 2024 01:03 PM study24x7 study24x7

A 0.00022 F capacitor equals how many microfarads?

A

22 μ F

B

220 μ F

C

2,200 μ F

D

22,200 μ F

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Electrical Engineering
5 followers study24x7 18 Dec 2024 01:01 PM study24x7 study24x7

A 12 kHz voltage is applied to a 0.33 μ 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

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Electrical Engineering
5 followers study24x7 18 Dec 2024 11:54 AM study24x7 study24x7

A 0.01 μ F capacitor equals how many picofarads?

A

100 pF

B

1,000 pF

C

10,000 pF

D

100,000 pF

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Electrical Engineering
5 followers study24x7 18 Dec 2024 11:41 AM study24x7 study24x7

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

A

air

B

mica

C

glass

D

paper

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Electrical Engineering
5 followers study24x7 17 Dec 2024 11:17 AM study24x7 study24x7

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

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Electrical Engineering
5 followers study24x7 17 Dec 2024 11:17 AM study24x7 study24x7

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

A

48 μ s

B

480 μ s

C

2.42 μ s

D

24 μ s

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Electrical Engineering
5 followers study24x7 17 Dec 2024 11:15 AM study24x7 study24x7

A 4.7 M Ω resistor is in series with a 0.015 μ 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

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Electrical Engineering
5 followers study24x7 16 Dec 2024 11:57 AM study24x7 study24x7

A capacitor of 2,000 pF is greater than

A

0.02 μ F

B

0.002 μ F

C

0.0002 μ F

D

0.0000002 F

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Electrical Engineering
5 followers study24x7 16 Dec 2024 11:56 AM study24x7 study24x7

Which of the following capacitors is polarized?

A

mica

B

ceramic

C

plastic-film

D

electrolytic

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Electrical Engineering
5 followers study24x7 16 Dec 2024 11:55 AM study24x7 study24x7

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

A

0.15 μF

B

0.30 μF

C

0.6 μF

D

0.8 μF

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Electrical Engineering
5 followers study24x7 13 Dec 2024 10:42 AM study24x7 study24x7

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

A

170 Ω

B

17 Ω

C

0.000169 Ω

D

1.7 Ω

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Electrical Engineering
5 followers study24x7 13 Dec 2024 10:40 AM study24x7 study24x7

What is the capacitance when Q = 60 μ C and V = 12 V?

A

720 μ F

B

5 μ F

C

50 μ F

D

12 μ F

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Electrical Engineering
5 followers study24x7 13 Dec 2024 10:07 AM study24x7 study24x7

A capacitor of 0.02 μ F is larger than

A

0.000020 F

B

200,000 pF

C

2,000 pF

D

all of the above

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