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Multiple Choice Question (MCQ) of Battery page-10


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91. Cells are connected in series to

A) increases the current capacity
B) decreases the internal resistance
C) decreases the voltage output
D) increases the voltage output.

Ans : (D)

Questions 92 and 93 refer to data given below : A ± 9 V supply is to be constructed using zinc-carbon dry cells. 92. The total number of cells required will be

A) 8 cells
B) 10 cells
C) 12 cells
D) 16 cells.

Ans : (C)

93. If one of the cells is accidentally connected in reverse, what will be the output from the supply?

A) 4.8 V
B) 5.4 V
C) 6 V
D) 7.5 V

Ans : (C)

Questions 94 and 95 refer to data given below : A 400 Ah lead acid battery is to be charged. 94. The minimum safe level of charging current is

A) 50 A
B) 60 A
C) 80 A
D) 100 A.

Ans : (A)

95. The internal resistance of the battery is 0.007Ω and the terminal voltage when discharged is 11.4 V. The initial output voltage level for the battery charge must be

A)11.75 V
B) 12 A
C) 12.35 V
D) 14 V.

Ans : (A)

96. 119 cells, each of emf 0.119 V and internal resistance 0.119 Ω are connected in parallel. The emf of the parallel combination will be

A) 0.119 V
B) 199 × 0.119 V
C) (119 + 0.119 ) V
D) 1000 V.

Ans : (A)

97. Two identical cells, when connected in series, supply a current of 0.45 amperes to a 10 ohm resistor. When these cells are connected in parallel, they supply 0.24 A to the same resistor. The internal resistance of each cell must be

A)1.2 ohm
B) 2.4 ohm
C) 0.45 ohm
D) 0.024 ohm.

Ans : (C)

Questions 98 and 99 refer to data given below : A 10 kW electric motor drives a vehicle at an average speed of 50 km/h. Ten, 12 V, 100 Ah batteries supply the motor. 98. The total Ah rating for batteries that will provide a range of 400 km will be

A) 667 Ah
B) 3130 Ah
C) 5555 Ah
D) 1600 Ah.

Ans : (A)

99. The maximum distance that the vehicle may travel before the batteries must be recharged, will be

A) 80 km
B) 60 km
C) 45 km
D) 30 km.

Ans : (B)

100. A solar cell supply with an output of approximately 13 V is to be constructed to recharge the 12 V batteries of a remote radio transmitter. The charging current is to be approximately 400 mA and the available solar cells each having an output of 0.45 V and 65 mA. The number of cells required will be

A) 43
B) 87
C) 174
D) 348.

Ans : (C)


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