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Measurement and Instrumentation

Measurement and Instrumentation
A galvanometer has

Eddy current damping
Spring coil damping
Fluid friction damping
Air friction damping

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Measurement and Instrumentation
A thermometer having first order dynamics is subjected to a sudden temperature change of 30oc to 150oc. If it has he time constant of 5 sec, what temperature will be indicated by after 5 sec?

 30o.
 105.6o.
 150o.
 63.25o.

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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 ± 3) A
 (400 ±5) A
 (400 ± 1) A

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Measurement and Instrumentation
The calibration of a voltmeter can be carried out by using

  A potentiometer.
 An ammeter.
 A frequency meter.
 A function generator.

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Measurement and Instrumentation
Instrument transformers are

Power transformers
Pottential transformers
Current transformers
Both current and potential transformers

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Measurement and Instrumentation
Which of following voltmeters would you use for measuring voltage across 20KΩ resistance

 Voltmeter having a resistance of 5 ΩK.
 Voltmeter having sensitivity of 1 KW/V.
  Voltmeter having sensitivity of 10 KW/V.
 None of above.

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