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Measurement and Instrumentation

Measurement and Instrumentation
A spring-controlled moving iron voltmeter draws a current of 1 mA for full scale value of 100V. If it draws a current of 0.5 mA, the meter reading is

 25 V.
 50 V.
 200 V.
 100 V.

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Measurement and Instrumentation
The adjustment of position of shading bands, in an energy meter is done to provide

None of the listed here
Friction compensation
Creep compensation
Breaking torque

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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

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

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Measurement and Instrumentation
The Metric System is also called as:

 CGS
None of these
 MKS system
 SI

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Measurement and Instrumentation
To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

From a source which is not the same as the unknown voltage
From a battery
From the same source as the unknown voltage
Any of the above

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Measurement and Instrumentation
A sampling wattmeter is used to measure the average power of a load. The peak to peak voltage of a square wave is 10 V and the current is triangular wave of 5 Amp P-P as shown in the figure. The period is 20 ms. The reading in W will be

  0 W.
 50 W.
 25 W.
 100 W.

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MORE MCQ ON Measurement and Instrumentation

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