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Measurement and Instrumentation

Measurement and Instrumentation
Relative error is same as

 ratio of absolute error and true value.
 true error.
 absolute error.
None of these

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

Wheatstone bridge
Voltmeter and ammeter
Potentiometer
Ohmmeter

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Measurement and Instrumentation
Systematic errors are

All of these
 environmental errors.
 instrument errors.
 observational errors.

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Measurement and Instrumentation
The coil of a moving coil meter has 100 turns, is 40 mm long and 30 mm wide. The control torque is 240×10-6 N-m on full scale. If magnetic flux density is 1Wb/m2 range of meter is

 3 mA.
 2 mA.
 1 mA.
 4 mA.

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Measurement and Instrumentation
The internal resistance of an ammeter should be

Infinity
Very small
Medium
High

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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?

0.84
0.65
0.73
1

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MORE MCQ ON Measurement and Instrumentation

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