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MEASUREMENT AND INSTRUMENTATION

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

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Measurement and Instrumentation
With a sweep time 10ms across the screen the approx. horizontal sawtooth frequency will be

100Hz
50Hz
1kHz
500Hz

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Measurement and Instrumentation
The thermocouple instrument will measure

Current
None of these
Voltage
Flux

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Measurement and Instrumentation
The thermocouple instruments do not have

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

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Measurement and Instrumentation
Which of the following instruments can be used to measure AC current only?

Moving iron ammeter
Permanent Magnet Type ammeter
Moving iron voltmeter
Induction type ammeter

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