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Measurement and Instrumentation

Measurement and Instrumentation
The resistance can be measured most accurately by

Megger
Bridge method
Multimeter
Voltmeter-ammeter method

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Measurement and Instrumentation
A spring-controlled moving iron voltmeter draws a current of 1 mA for full scale value of 100V. If it draws a current of 0.5 mA, the meter reading is

 25 V.
 100 V.
 200 V.
 50 V.

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Measurement and Instrumentation
Moving iron instruments have _____ scale.

Squared
Log
Uniform
None of the listed here

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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
The coil of a moving iron instrument has a resistance of 500 ohm and inductance of 1 H. It reads 250 V when a 250 V DC is applied. It series resistance is 2000 ohms its reading when fed by 250 V, 50 Hz AC will be

 252 V.
 250 V.
 260 V.
 248 V.

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Measurement and Instrumentation
One single phase wattmeter operating on 230V and 5A for 5 hours makes 1940 revolutions. Meter constant in revolutions is 400. What is the power factor of the land?

0.65
1
0.84
0.73

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MORE MCQ ON Measurement and Instrumentation

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