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Measurement and Instrumentation

Measurement and Instrumentation
In a portable instrument , the controlling torque is provided by

All of the listed here
Spring
Eddy currents
Gravity

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Measurement and Instrumentation
Wagner earthing device is used to eliminate errors due to

Electromagnetic coupling
Both A and B
Electrostatic coupling
None of these

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Measurement and Instrumentation
The range of a moving iron ac ammeter is extended by

Changing number of turns of operating coil
None of the listed here
A multiplier
A shunt

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Measurement and Instrumentation
A high frequency AC signal is applied to a PMMC instrument. The RMS value of the AC signal is 2V, the reading of the instrument is

 2V.
 2√2V.
 Zero.
 √2V.

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Measurement and Instrumentation
Instrument transformers are

Pottential transformers
Both current and potential transformers
Current transformers
Power transformers

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Measurement and Instrumentation
0-150 V voltmeter has an accuracy of 1% of full-scale reading. The voltage measured by the instrument is 75 V. The limiting error is

 1%
 4%
 3%
 2%

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MORE MCQ ON Measurement and Instrumentation

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