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Measurement and Instrumentation

Measurement and Instrumentation
An electrodynamic meter can be used to measure

 DC current.
  both AC and DC voltage.
 DC voltage.
 AC volatge.

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Measurement and Instrumentation
For measuring an AC voltage by an AC potentiometer it is desirable that the supply for the potentiometer is taken from

 A battery.
 Any of above.
 A source other than the source of unknown voltage.
 The same source as the unknown voltage.

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Measurement and Instrumentation
Wagner earthing device is used to eliminate errors due to

Electromagnetic coupling
None of these
Electrostatic coupling
Both A and B

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

Bearing
Torque control
Damping
Suppressing noise

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Measurement and Instrumentation
A metal strain gauge has a gauge factor of two. Its nominal resistance is 120 ohms. If it undergoes a strain of 10-5, the value of change of resistance in response to the strain is

 120 Ohm.
 240 Ohm.
 0.0024 Ohm.
 0.0012 Ohm.

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Measurement and Instrumentation
To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

 sinisoidal.
 an ellipse.
  a circle.
 a straight line.

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MORE MCQ ON Measurement and Instrumentation

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