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Measurement and Instrumentation

Measurement and Instrumentation
Commonly used instruments in power system measurement are

Rectifier
Moving coil or iron
Electrostatic
Induction

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Measurement and Instrumentation
Which of following are needed both for protection and metering?

 Power factor meters.
 Instrument transformer.
 Wattmeters.
 Energy meter.

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

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

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Measurement and Instrumentation
What is the standard unit for length ?

 Meter
 Kilometer
 Inch
 Centimeter

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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

 248 V.
 252 V.
 260 V.
 250 V.

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Measurement and Instrumentation
In the bridge given in the figure, the reading of the high impedance voltmeter is

 - 3.33 V.
 6.66 V.
 4.20 V.
 Zero.

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MORE MCQ ON Measurement and Instrumentation

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