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Measurement and Instrumentation

Measurement and Instrumentation
In induction type ammeter, _____ damping is provided.

Eaddy current
Fluid friction
Air friction
None of the listed here

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

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

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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.
 4.20 V.
 6.66 V.
 Zero.

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Measurement and Instrumentation
The material of the shunt should have _______ temperature co-efficient of resistance.

Negligible
None of the listed here
Positive
Negative

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Measurement and Instrumentation
Instrument transformers are

Pottential transformers
Both current and potential transformers
Current transformers
Power transformers

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Measurement and Instrumentation
In figure Z1 = 200∠60° ohm. Z2 = 400∠-90° ohm, Z3 = 300∠0° ohm. Then Z4 for bridge to be balanced is

 300∠90° ohm.
 400∠-90° ohm.
 150∠30° ohm.
 600∠-150° ohm.

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