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Measurement and Instrumentation

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

Air friction
None of the listed here
Eaddy current
Fluid friction

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Measurement and Instrumentation
The transfer instrument which is used for standardization of a polar type AC potentiometer is

 a dynamometer instrument.
 an electrostatic instrument.
 a moving coil instrument.
 a thermal instrument.

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Measurement and Instrumentation
A voltmeter using thermocouple measures

  rms value.
 Peak to peak value.
 Average value.
 Peak value.

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Measurement and Instrumentation
The total current I = I1 + I2 in a circuit is measured I1 = 150 ± 3A , I2 = 250 ± 4 A, where the limits of error are given as standard deviations. I is measured as

 (400 ± 2.24) A
 (400 ±5) A
 (400 ± 3) A
 (400 ± 1) A

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Measurement and Instrumentation
Null type recorders are

 potentiometric recorders.
 bridge recorders.
 any one of the above.
 LVDT recorders.

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

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

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