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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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Electrical Engineering
5 followers study24x7 11 Dec 2024 10:59 AM study24x7 study24x7

A capacitor and a resistor are connected in series to a sine wave generator. The frequency is set so that the capacitive reactance is equal to the resistance and, thus, an equal amount of voltage appears across each component. If the frequency is increased

A

VR > VC

B

VC > VR

C

VR = VC

D

VR and VC = 0

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Electrical Engineering
5 followers study24x7 11 Dec 2024 10:58 AM study24x7 study24x7

A 10 μF, 20 μF, 22 μF, and 100 μF capacitor are in parallel. The total capacitance is

A

2.43 μF

B

4.86 μF

C

100 μF

D

152 μF

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