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Measurement and Instrumentation

Measurement and Instrumentation
A moving coil permanent magnet instrument can be used as ______ by using a low resistance shunt.

Ammeter
Ballastic galvanometer
Voltmeter
Flux meter

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Measurement and Instrumentation
The dynamometer principle can be used for

 ammeter only.
 ammeter, voltmeter and wattmeter.
 wattmeter only.
 voltmeter only.

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Measurement and Instrumentation
Swamping resistance is used to compensate

 error due to temperature true variations.
 both A and B.
 none of these.
 error due to strong magnetic field.

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Measurement and Instrumentation
For the AC bridge circuit shown in figure at balance the value of Rd will be

 (Ra/Rc).Rb.
 (Rb/Rc).Ra.
 (Rc/Rb).Ra.
 (Rc/Ra).Rb.

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Measurement and Instrumentation
A moving coil ammeter has a uniform scale with 50 division and gives a full scale reading 10 A. The instrument can read up to (1/5)th of a scale division with a fair degree of certainty. What is the resolution of the instrument in mA?

 50 mA.
 80 mA.
 25 mA.
  40 mA.

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Measurement and Instrumentation
The terminals across the source are ______________________________ if a current source is to be neglected.

  replaced by a source resistance
 short circuited
 open circuited
  replaced by a capacitor

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