Multiple Choice Question (MCQ) of Measurements page-6

51. A 100: 5 transformer is used in conjunction with a 5 amp ammeter. If latter reads 2.5 amps the line current will be

a) 2.5 × 100/5 amps
b) 2.5 × 5/100 amps
c) 2.5 × (5/100)²
d) 2.5 × (100/5)²

Ans: (a)

52. Which of the following circuit has no transients?

a) Pure resistive circuit
b) L-C circuit
c) R-L-C circuit
d) R-L circuit

Ans: (a)

53. Which of the following statement is true?

a) A galvanometer with low resistance in series is an ammeter
b) A galvanometer with high resistance in series is an ammeter
c) A galvanometer with high resistance in parallel is a voltmeter
d) A galvanometer with low resistance in parallel is a voltmeter

Ans: (a)

54. A voltage source can be converted into constant current source by adding

a) Low resistance in parallel with the voltage source
b) High resistance in parallel with the voltage source
c) Low resistance in series with the voltage source
d) High resistance in series with the voltage source

Ans: (d)

55. permeability in the magnetic circuit is analogous to

a) Resistance in electrical circuit
b) Resistivity in electrical circuit
c) Conductivity in electrical circuit
d) Current density
e) None of the above

Ans: (c)

56. Which of the following statements is correct?

a) 1 volt = 1 wb
b) 1 volt = 1 wb/second
c) Volt has no relation with Weber
d) 1 volt = 1 wb-second

Ans: (b)

57. A conductor of length 100 cm moves right angle to a magnetic field of flux density of 2 wb/m² with the velocity of 25 m/second. The induced e.m.f. in the conductor will be

a) 25 volts
b) 50 volts
c) 75 volts
d) 100 volts

Ans: (b)

58. The ratio error in the current transformer is attributed

a) Wattles component of the current in the primary
b) Exciting current
c) Power factor of the primary
d) Leakage flux

Ans: (b)

59. The phase angle error of current transformer is of no importance if it is feeding an ammeter.

a) True
b) False

Ans: (a)

60. Wheatstone bridge is analogous to

a) Cantilever
b) Simple level system
c) Gear train
d) Mechanical clutch

Ans: (b)

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Multiple Choice Question (MCQ) of Measurements page-6

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