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Measurement and Instrumentation

Measurement and Instrumentation
The ratio of change in output to the change in the input is called

 repeatability
 resolution
 precision
 sensitivity

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Measurement and Instrumentation
Commonly used instruments in power system measurement are

Electrostatic
Moving coil or iron
Rectifier
Induction

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Measurement and Instrumentation
______ movement is most expensive.

Dynamometer
Moving iron
None of the listed here
D'Arsonval movement

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Measurement and Instrumentation
______ instruments are most sensitive.

Permanent magnet moving coil
Hot wire
Dynamometer
Moving iron

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Measurement and Instrumentation
A megger is usually

Moving iron type instrument
Hot-wire type instrument
Moving coil type instrument
Electro-static type instrument

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Measurement and Instrumentation
The resistance in the circuit of the moving coil of a dynamometer wattmeter should be

High
None of the listed here
Almost zero
Low

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