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Measurement and Instrumentation

Measurement and Instrumentation
The problem of Electrostatic coupling in a transformer is acute at

Power frequencies
High load on the transformer
High frequencies
Low frequencies

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Measurement and Instrumentation
A null type instrument as compared to a deflected type instrument has

 a faster response.
 a higher accuracy.
All of these
 a lower sensitivity.

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Measurement and Instrumentation
An oscilloscope indicates

DC value of voltage
Average value
RMS value
Peak to peak value of voltage

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Measurement and Instrumentation
Alternating current is measured by

Induction ammeter
Moving iron repulsion type voltmeter
Permanent magnet type ammeter
Electrostatic ammeter

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Measurement and Instrumentation
An ammeter is ______ instrument.

An integrating
An indicating
A recording
None of the listed here

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

Both A and B
None of these
Electrostatic coupling
Electromagnetic coupling

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