71.A capacitor consists of

A. Two insulators separated by a conductor

B. Two conductors separated by an insulator

C. Two insulators only

D. Two conductors only

Ans. B

72.Which of the following capacitors will have least energy stored in it ?

A. A 20 μF capacitor is charged to 400 volt

B. A 1 μF capacitor charge to 5 KV

C. A 600 μF capacity charged to 15 KG

D. Energy stored in each above will be same

Ans. C

73……………field is associated with the capacitor

A. Electric

B. Magnetic

C. Both A and B

D. None of the above

Ans. A

74.A capacitor consists of two

A. Ceramic plates and one mica disc

B. Insulators separated by a dielectric

C. Silver coated insulators

D. Conductors separated by an insulator

Ans. D

75. ……….is that property of a capacitor which delays any change of voltage across it

A. Inductance

B. Capacitance

C. Potential gradient

D. None of the above

Ans. B

76.When a capacitor undergoes a dielectric breakdown

A. Dielectric stores energy rendering plates charge less

B. Electrons get scattered

C. Electrons cease to move from one place to another

D. Permanent conduction path is established between plates

Ans. D

77.If the dielectric of a capacitor is replaced by a conducting material

A. The capacitance value of the capacitor will shoot up to very high value

B. The capacitor can store infinite charge

C. The plates will get short-circuited

D. The capacitor will get heated up due to eddy currents

Ans. B

78.Internal heating of a capacitor is usually attributed to

A. Electron movement

B. Leakage resistance

C. Dielectric charge

D. Plate vibration

Ans. B

79.In a capacitor the electric charge is stored in

A. Metal plates

B. Dielectric

C. Dielectric as well as metal plates

D. None of the above

Ans. B

80.A capacitor having a capacitance of 40 μF is connected across 250 V DC source. The charging current will be least

A. When capacitor is fully charged

B. When capacitor is have charged

C. When capacitor is almost 25% charged

D. None of the above

Ans. A

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61.Three capacitors each of the capacity C are given. The resultant capacity 2/3 C can be obtained by using them

A. All in series

B. All in parallel

C. Two in parallel and third in the series with this combination

D. Two in series and third in parallel across this combination

Ans. C

62.If 10 μF capacitors are connected in parallel the, net capacitance is

A. 20 μF

B. 30 μF

C. 50 μF

D. 40 μF

Ans. B

63.If 15 μF capacitors are connected in series, the net capacitance is

A. 5 μF

B. 30 μF

C. 45 μF

D. 50 μF

Ans. A

64.Which of the following capacitors will have the least variation?

A. Paper capacitor

B. Ceramic capacitor

C. Silver plated mica capacitor

D. None of the above

Ans. C

65.Which of the following capacitors has relatively shorter shelf life?

A. Mica capacitor

B. Electrolytic capacitor

C. Ceramic capacitor

D. Paper capacitor

Ans. B

66. The capacitor preferred for high-frequency circuit is

A. Air capacitor

B. Mica capacitor

C. Electrolytic capacitor

D. None of the above

Ans. B

67.Which capacitor will be physically smaller for the same ratings ?

A. Ceramic capacitor

B. Paper capacitor

C. Both will be equal size

D. None of the above

Ans. A

68.Which of the following capacitors will have the least value of breakdown voltage?

A. Mica

B. Paper

C. Ceramic

D. Electrolytic

Ans. D

69.In the case of a lossy capacitor, its series equivalents resistance value will be

A. Small

B. Very small

C. Large

D. Zero

Ans. C

70.In a capacitor the electric charge is stored in

A. Metal plates

B. Dielectric

C. Both A and B

D. None of the above

Ans. B

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51.The units of capacitance are

A. Volts/coulomb

B. Coulombs/volt

C. Henry/wb

D. Ohms

Ans- B

52. The capacitance of a capacitor is not affected by

A. Distance between plates

B. Area of plates

C. Thickness of plates

D. All of the above

Ans- C

53.Capacitance increases with

A. Increase in plate area and decrease in distance between the plates

B. Increase in the plate area and distance between the plates

C. Decrease in the plate area and value of applied voltage

D. Reduction in plate area and distance between the plates

Ans- A

54. The inverse of capacitance is called

A. Reluctance

B. Conductance

C. Susceptance

D. Elastance

Ans- D

55.The capacitance of a capacitor is influenced by

A. Plat area

B. Plate separation

C. Nature of dielectric

D. All of the above

Ans- D

56.The capacitance between two plates increases with

A. Shorter plate area and higher applied voltage

B. Shorter play area and shorter distance between them

C. Larger plate area, longer distance between plates and higher applied voltage

D. Larger plate area and shorter distance between plates

Ans- D

57.The capacitance C is charged through a resistor R. The time constant of the charging circuit is given by

A. C/R

B. 1/RC

C. RC

D. R/C

Ans- C

58. The capacitance of 1 μF equals

A. 10 ^-12 F

B. 10^-8 F

C. 10^-6 F

D. 10^-4 F

Ans- C

59.The capacitance is a circuit component that oppose the change in circuit

A. Current

B. Voltage

C. Impedance

D. None of the above

Ans- B

60.The ohmmeter reading for a short circuited capacitor is

A. Infinity

B. Few kilo ohms

C. Few megaohms

D. Zero

Ans- D

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41.The units of capacitance are

A. Volts/coulomb
B. Coulombs/volt
C. Henry/wb
D. Ohms

Ans. B

42The capacitance of a capacitor is not affected by

A. Distance between plates
B. Area of plates
C. Thickness of plates
D. All of the above

43.Capacitance increases with

A. Increase in plate area and decrease in distance between the plates
B. Increase in the plate area and distance between the plates
C. Decrease in the plate area and value of applied voltage
D. Reduction in plate area and distance between the plates

Ans. A

44..The inverse of capacitance is called

A. Reluctance
B. Conductance
C. Susceptance
D. Elastance

Ans. D

45.The capacitance of a capacitor is influenced by

A. Plat area
B. Plate separation
C. Nature of dielectric
D. All of the above

Ans. D

46.The capacitance between two plates increases with

A. Shorter plate area and higher applied voltage
B. Shorter play area and shorter distance between them
C. Larger plate area, longer distance between plates and higher applied voltage
D. Larger plate area and shorter distance between plates

Ans. D

47.he capacitance C is charged through a resistor R. The time constant of the charging circuit is given by

A. C/R
B. 1/RC
C. RC
D. R/C

Ans. C

48.The capacitance of 1 μF equals

A. 10 ^-12 F
B. 10^-8 F
C. 10^-6 F
D. 10^-4 F

Ans. C

49.The capacitance is a circuit component that oppose the change in circuit

A. Current
B. Voltage
C. Impedance
D. None of the above

Ans. B

50.The ohmmeter reading for a short circuited capacitor is

A. Infinity
B. Few kilo ohms
C. Few megaohms
D. Zero

Ans. D

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