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Measurement and Instrumentation

Measurement and Instrumentation
The problem of Electrostatic coupling in a transformer is acute at

High load on the transformer
Low frequencies
Power frequencies
High frequencies

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Measurement and Instrumentation
When a potentiometer is used for measurement of voltage of an unknown source, the power consumed in the circuit of the unknown source under null condition is

 high.
 small.
 very high.
 ideally zero.

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Measurement and Instrumentation
The electrical power to a megger is provided by

Ac generator
Any of the listed here
Permanent magnet dc generator
Battery

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Measurement and Instrumentation
Resistance of a VARISTOR varies with

 Both Voltage and Temperature
 Voltage
 Temperature
 Current

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Measurement and Instrumentation
A mulliammeter can be used as

Ohmmeter
Voltmeter and ammeter
Wattmeter
Frequency meter

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Measurement and Instrumentation
The thermocouple instruments do not have

Independence of ambient temperature
High sensitivity
Absence of frequency error
High degree of measuring accuracy

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MORE MCQ ON Measurement and Instrumentation

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