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-7


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61. The term trickle charge is associated with

A) dry cells
B) lead acid batteries
C) silver zinc batteries
D) nickel iron batteries.

Ans : (B)

62. Which of the following statements is not correct? A lead accumulator of 20 ampere hour can supply

A) 20 A of current for 20 hours
B) 1 A of current for 20 hours
C) 20 A of current for 1 hour
D) 0.1 A of current for 200 hours.

Ans : (A)

63. In the above case the voltage at A with respect to B when t = 2π/3 will be

A) - 10 V
B) + 10 V
C) - 8.66 V
D) + 8.66 V.

Ans : (D)

64. An energy source has A terminal marked + and the B terminal marked -. The voltage at the terminal is V(t) = 10 cos ( 3t + π/6 ). The voltage at A with respect to B when t = π/3 will be

A) + 10 V
B) - 10 V
C) + 8.66 V
D) - 8.66 V .

Ans : (D)

65. A set of batteries have terminal voltage of 1, 3, 5 and 7 volts. How many integer values of terminal voltages can be obtained by appropriate connection ?

A) 4
B) 8
C) 16
D) 64.

Ans : (C)

66. 12 cells each having the same emf are connected in series and are kept in a closed box. Some of the cells are wrongly connected. This battery is connected in series with an ammeter and two cells identical with the others. The current is 2 amperes when the cells and battery aid each other and is 2 amperes when the cells and battery oppose each other. How many cells in battery are wrongly connected ?

A) One
B) Two
C) Three
D) Four.

Ans : (A)

67. The specific gravity of acid is checked with the help of a

A) hydrometer
B) hygrometer
C) lactometer
D) cell tester.

Ans : (A)

68. Even when not in use, the self-discharge of a battery occurs at the rate of

A) 0.5 to 1% of rated capacity per hour
B) 0.5 to 1% of rated capacity per day
C) 0.5 to 1% of rated capacity per week
D) 0.5 to 1% of rated capacity per month.

Ans : (B)

Questions 69 to72 refer to data given below : Three batteries each having an emf of 1.40 volts and respective internal resistances of 0.25, 0.20 and 0.10 ohms are connected in parallel to supply current to a load resistance of 1.5 ohms. 69. The equivalent resistance of the battery is

A) 0.0526 ohm
B) 0.526 ohm
C) 1.9 ohm
D) 19 ohms.

Ans : (A)

70. The current from the battery will be

A) 21.2 A
B) 10.9 A
C) 1.902 A
D) 0.902 A.

Ans : (D)


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