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Measurement and Instrumentation

Measurement and Instrumentation
A moving iron instrument can be used for

DC only
AC only
Both DC& AC
None of the listed here

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Measurement and Instrumentation
To measure high frequency currents, we mostly use ______ ammeter.

Dynamometer
Hot wire
Thermocouple
Moving iron

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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

 4%
 2%
 3%
 1%

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Measurement and Instrumentation
PMMC type instruments normally use

Eddy current damping
Fluid friction damping
Air friction damping
None of these

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Measurement and Instrumentation
Resistance of a VARISTOR varies with

 Voltage
 Current
 Both Voltage and Temperature
 Temperature

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Measurement and Instrumentation
The core flux in the CT of above question no.6, under the given operating conditions is

 450 mWb.
 0.
 225 mWb.
 1000 mWb.

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