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Measurement and Instrumentation

Measurement and Instrumentation
For measurement of mutual inductance we can use

Any of the listed here
Anderson bridge
Maxwell's bridge
Heavyside bridge

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Measurement and Instrumentation
If two 300V full scale voltmeters V1 and V2 having sensitivities of 100 kOhm/V and 150 kOhm/V are connected in series to measure 500V then

 V1 = 300V and V2 = 200V.
 V1 = 200V and V2 = 300V.
 V1 = 0V and V2 = 0V.
 V1 = 250V and V2 = 250V.

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Measurement and Instrumentation
______ instruments are most sensitive.

Hot wire
Moving iron
Permanent magnet moving coil
Dynamometer

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Measurement and Instrumentation
Ratio of readings of two wattmeter connected to measure power in a balanced 3-phase load is 5:3 and the load is inductive. The power factor at load is

 0.6 lead.
 0.917 lag.
 0.917 lead.
 0.6 lag.

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Measurement and Instrumentation
The meter constant of a single phase 240 V induction watthour meter is 400 revolutions per KWh. The speed of the meter disc for a current of 10 Amperes of 0.8 p.f lagging will be

  12.8 rpm.
 21.1 rpm.
 16.02 rpm.
 18.2 rpm.

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

 0.
 225 mWb.
 1000 mWb.
 450 mWb.

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MORE MCQ ON Measurement and Instrumentation

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