Multiple Choice Question (MCQ) of Battery page-8

71. The terminal voltage will be

A) 1.1 V
B) 1.15 V
C) 1.5 V
D) 1.35 V.

Ans : (D)

72. Least current will be supplied by battery having internal resistance of

A) 0.25 ohm
B) 0.10 ohm
C) 0.20 ohm
D) all batteries will supply same current.

Ans : (A)

73. Four dry cells having emfs 1.50, 1.30, 1.35, 1.40 volts and resistances 0.3, 0.4, 0.2, 0.1 ohms, are connected in series to operate a relay having a resistance of 10 ohms. The relay current is

A) 4.86 A
B) 0.504 A
C) 1.34 A
D) 0.134 A.

Ans : (B)

74. A voltmeter connected across the terminal of a dry cell, reads 1.40 volts when the cell is open-circuited. The voltmeter reads 1.02 volts when the cell delivers a current of 3.0 A. The internal resistance of the cell is

A) 0.34 ohm
B) 0.467 ohm
C) 0.127 ohm
D) 0.00127 ohm.

Ans : (C)

75. The open-circuit emf of a storage cell is 2.2 volts. The terminal voltage measured when the current is 12 A is found to be 1.98 volts. The internal resistance of the cell is

A) 1.83 ohm
B) 0.183 ohm
C) 0.0183 ohm
D) 0.00183 ohm.

Ans (C)

76. In a lead acid cell PbSO₄ is formed during

A) charging only
B) discharging only
C) both during charging as well as discharging
D) neither during charging nor discharging.

Ans : (B)

77. In a lead acid cell, hydrogen is liberated at

A) negative plate
B) positive plate
C) both negative and positive plates
D) none of the plates.

Ans : (A)

78. A fuel cell converts………energy into electrical energy

A) solar
B) magnetic
C) mechanical
D) chemical.

Ans : (D)

79. While comparing alkaline batteries, with lead acid batteries, which one of the following can be cited as the advantage of the former over the latte?

A) Low initial cost
B) Electrical robustness
C) High output voltage
D) All of the above.

Ans : (B)

80. Which efficiency of a battery is more than the remaining?

A) Watt hour efficiency
B) Ampere hour efficiency
C) Overall efficiency
D) (A), (B), and (C) above have the same value.

Ans : (B)

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Multiple Choice Question (MCQ) of Battery page-8

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