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Measurement and Instrumentation

Measurement and Instrumentation
Most accurate measurement of unknown resistance will be by

Potentiometer
Ohmmeter
Wheatstone bridge
Voltmeter and ammeter

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Measurement and Instrumentation
When a potentiometer is used for measurement of voltage of an unknown source, the power consumed in the circuit of the unknown source under null condition is

 small.
 very high.
 ideally zero.
 high.

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Measurement and Instrumentation
When using ohmmeter, applied voltage is to be disconnected from the circuit because

Current will decrease resistance
The ohmmeter has its own internal battery
None of these
Voltage source will increase resistance

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Measurement and Instrumentation
The best type of meter moment is ______ moment.

Dynamometer
D'Arsonval
Iron- vane
None of the listed here

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Measurement and Instrumentation
A moving iron ammeter may be compensated for frequency errors by

Series resistance
A shunt resistance
A series inductance
Shunt capacitance

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Measurement and Instrumentation
A thermo couple ammeter gives full scale deflection of 10 A, when it reads one fifth of the scale, the current will be

 5.78 A.
 2 A.
  4.47 A.
 4 A.

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MORE MCQ ON Measurement and Instrumentation

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