Index

SymbolsTransformerRelayPower-SystemBasic-electricalACSR-ConductorCircuit-BreakerInterview-questions-of-Basic-ElectricityInterview-questions-of-transformerInsulatorCurrent-TransformerMCQMCQ-powersystemThermal-power-stationInterview-questions-of-Power-SystemPower-ElectronicsInterview-questions-of-Underground-CableInterview-questions-of-IlluminationIlluminationMCQ-of-ElectronicsMCQ-of-Basic-ElectricalMCQ-of-Transformers MCQ-of-D.C-motor MCQ-of-D.C-generatorsMCQ-Control-SystemMCQ-Measurementsmcq-of-Generation-power-systemMCQ-of-Induction-MotorMCQ-of-Transmission-DistributionMCQ-of-Electrical-MachinesMCQ-of-Alternator-and-Synchronous-MotorsMCQ-Electric-PowerMCQ-Illumination

Multiple Choice Question (MCQ) of Battery page-11


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101. A power supply to be constructed from voltage cells is required to supply a maximum current of 20 amperes with a terminal voltage of approximately 6 V. Several voltage cells are available, each of which has a terminal voltage of 1.5 V and each of which can supply a maximum current of 5 A. The number of cells required will be

A) 16
B) 24
C) 8
D) 4.

Ans : (A)

102. A parallel-connected battery of 1.5 V cells is to supply current to a 0.15 ohm resistor. If each cell can supply a maximum current of 1 A, determine the number of cells required

A) 2
B) 4
C) 5
D) 10.

Ans : (D)

103. A cell which is used as a voltage reference source for instrument calibration is

A) solar cells
B) mercury-cadmium cell
C) dry cell
D) nickel-cadmium cell.

Ans : (B)

104. The efficiency of a modern accumulator is of the order of :

A) 33 %
B) 50 %
C) 70 %
D) 100 %.

Ans : (C)

105. The electrolyte used in nickel cadmium cell is

A) Ammonium hydroxide
B) Potassium hydroxide
C) Sulphuric acid (dilute)
D) Sodium chloride solution.

Ans : (B)

106. In Edison cell the positive plates consists of

A) Spongy iron
B) Pure nickel
C) Iron
D) Nickel hydroxide.

Ans : (D)

107. In Edison cell the concentration of electrolyte

A) increases during charging
B) decreases during charging
C) increases during discharging
D) remains unaltered.

Ans : (D)

108. In nickel-iron cell the electrolyte is

A) dilute sulphuric acid
B) dilute potassium hydroxide
C) dilute ammonium hydroxide
D) dilute sodium chloride solution.

Ans : (B)

109. The reference junction of a thermocouple is maintained at

A) room temperature
B) 0°C
C) 0° F
D) 0° K.

Ans : (B)

Questions 110 and 114 refer to data given below : A battery cell having an emf of 2.2 volts and an internal resistance of 0.03 ohms is connected to an external resistance of 0.10 ohm. 110. The current drawn from the battery could be

A) 10.2 A
B) 16.9 A
C) 22 A
D) 83 A.

Ans : (B)


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