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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
Current
Squareroot of the current

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Measurement and Instrumentation
Ryall crest voltmeter is used for measurement of

AC voltage of any form
High AC voltage
High DC voltage
Low frequency voltage

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Measurement and Instrumentation
In a moving iron meter, the deflecting torque is proportional to

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

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Measurement and Instrumentation
Which of the quantity consists of unit as Pascal ?

 Force
 Temperature
 Impulse
 Pressure

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Measurement and Instrumentation
Jewels are used in instruments for the purpose of

Suppressing noise
Bearing
Torque control
Damping

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Measurement and Instrumentation
The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ?

 ±0.5%
 ± 3.0%
 ±3.5%
 ± 1.5%

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