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Measurement and Instrumentation

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

Electrostatic coupling
Electromagnetic coupling
Both A and B
None of these

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Measurement and Instrumentation
Which of following are needed both for protection and metering?

 Power factor meters.
 Instrument transformer.
 Wattmeters.
 Energy meter.

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Measurement and Instrumentation
Resistances can be measured with the help of

Ammeters
Voltmeters
Ohmmeters and resistance bridges
Wattmeters

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

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

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Measurement and Instrumentation
The multiplier and the meter coil in a voltmeter are in

Series-parallel
None of the listed here
Series
Parallel

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Measurement and Instrumentation
Electrostatic instruments are used as

Wattmeter only
Both ammeter and voltmeter
Ammeters only
Voltmeters only

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