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Measurement and Instrumentation

Measurement and Instrumentation
Induction type single phase energy meters measure electric energy in

Wh
kWh
kW
VAR

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Measurement and Instrumentation
A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads

 (2 + √3/2)V.
 2 V.
 0 V.
 5 V.

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Measurement and Instrumentation
The moving coil-meters, damping is provided by

 the aluminium frame of the coil.
 eddy current disk.
 damping vane in the airtight chamber.
 the coil spring attached to the moving.

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Measurement and Instrumentation
The pointer of an indicating instrument is generally made of _______

Copper
Soft steel
Silver
Aluminium

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Measurement and Instrumentation
Which of following voltmeters would you use for measuring voltage across 20KΩ resistance

 Voltmeter having a resistance of 5 ΩK.
 Voltmeter having sensitivity of 1 KW/V.
 None of above.
  Voltmeter having sensitivity of 10 KW/V.

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Measurement and Instrumentation
Relative permittivity can be measured by _______ bridge

 Desautys.
 Hays.
 Schering.
 Wheatstones.

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