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Multiple Choice Question (MCQ) of Measurements page-8

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71. To check the continuity of the circuit by multimeter, the best of the following ranges to use is R ×

a) 1,000
b) 10,000
c) 100,000
d) 1

Ans: (d)

72. The applied voltage is to the circuit being checked is disconnected when an ohmmeter is used because

a) The voltage source will increase the resistance
b) The current will decrease the resistance
c) The ohmmeter has its own battery
d) No current is needed for matter movement

Ans: (c)

73.When the voltage is measured by a multimeter, the multiplier for voltage is

a) A high resistance in series with the meter movement
b) A high resistance in parallel with the meter movement
c) Less than one ohm in series with the meter movement
d) Less than one ohm in parallel with the meter movement

Ans: (b)

74. A VTVM has negligible loading effect on the circuit being cheeked because it has

a) A high resistance range of R × 1 M Ω
b) High input resistance of 11 MΩ or more
c) Low current ranges of 59 micro-ampere or less
d) Low input resistance equal to the lowest value on the R × 1 range

Ans: (b)

75. The Wheatstone bridge is used to measure

a) Low value of current
b) High value of current
c) High value of voltage
d) Low value of voltage
e) Resistance value

Ans: (e)

76. The insulating materials are used to

a) Conduct very large current
b) Present an open circuit between the voltage source and the load
c) Prevent short circuit between conducting wires
d) Store very high currents

Ans: (c)

77. The internal resistance of the milliammeter must be very low for

a) High sensitivity
b) High accuracy
c) Maximum voltage drop across the meter
d) Minimum effect on the current in the circuit

Ans: (d)

78. The internal resistance of the voltmeter must be very high in order to have

a) High voltage range
b) Minimum current through the meter
c) Maximum loading effect
d) More current supplied by the voltage source

Ans: (d)

79.The total flux of 5000 lines equal

a) 1,26 gilberts
b) 5,000 gauss
c) 5,000 maxwells
d) 16,000 kilolines

Ans: (c)

80. The flux of 4,000 lines through 4 cm2 equals a flux density of

a) 1,000 gauss
b) 2,000 gauss
c) 4,000 gauss
d) 16,000gauss

Ans: (a)

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