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Measurement and Instrumentation

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

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

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Measurement and Instrumentation
The coil of a moving iron instrument has a resistance of 500 ohm and inductance of 1 H. It reads 250 V when a 250 V DC is applied. It series resistance is 2000 ohms its reading when fed by 250 V, 50 Hz AC will be

 250 V.
 260 V.
 252 V.
 248 V.

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Measurement and Instrumentation
To measure the flux, devices used are based on

Hall effect
Voltaic effect
Piezo-electric effect
Photo-voltaic effect

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Measurement and Instrumentation
An electric pyrometer is an instrument used to measure

Frequency
High temperatures
None of the listed here
Phase

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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
If two meters X and Y require 40 mA and 50 mA respectively, to give full scale deflection, then

 X is more sensitive.
 It would not be possible to assess the sensitivity on the basis of the given data.
 Y is more sensitive.
 Both X and Y are equally sensitive.

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