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Measurement and Instrumentation

Measurement and Instrumentation
In a moving coil instrument, the deflecting torque is proportional to

Square of the current
Sine of the measurand
Squareroot of the current
Current

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1 V.
 1.5 V.
 1.7 V.
 1.34 V.

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Measurement and Instrumentation
A rectifier type instrument is connected to 100VDC and is operated in the DC measuring module reads

50V
111V
90V
100V

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Measurement and Instrumentation
Comparison methods are used

 because they are most simple.
 because they take least time in measurement.
 when a high accuracy of measurement is required.
 because they are expensive.

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

High frequencies
Low frequencies
High load on the transformer
Power frequencies

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Measurement and Instrumentation
A megger is usually

Hot-wire type instrument
Electro-static type instrument
Moving coil type instrument
Moving iron type instrument

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MORE MCQ ON Measurement and Instrumentation

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