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Measurement and Instrumentation

Measurement and Instrumentation
For handling greater currents induction watt-meters are used in conjunction with

Power transformers
Either of the above
Potential transformers
Current transformers

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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

 25 W.
  0 W.
 50 W.
 100 W.

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Measurement and Instrumentation
A potentiometer may be used for

Measurement of current
Calibration of ammeter
Measurrment of resistance
All of the listed here

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Measurement and Instrumentation
A PMMC instrument can be used as flux meter

By using a low resistance shunt
By using a high series resistance
By eliminating the control springs
By making control springs of large moment of inertia

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Measurement and Instrumentation
Resistance of a VARISTOR varies with

 Voltage
 Both Voltage and Temperature
 Temperature
 Current

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Measurement and Instrumentation
_______ instruments are those which measure the total quantity of the electricity delivered in a particular time.

Integrating
Indicating
Recording
Absolute

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MORE MCQ ON Measurement and Instrumentation

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