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Measurement and Instrumentation

Measurement and Instrumentation
The operating voltage of a megger is about

100 V
40 V
6 V
12 V

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Measurement and Instrumentation
A wheatstone bridge cannot be used for precision measurements because errors are introduced into on account of

 Thermoelectric emfs.
 All of above.
 Contact resistance.
 Resistance of connecting leads.

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Measurement and Instrumentation
A voltage of 2.70 V is being measured by an analog indicating instrument having a scale range of 0 – 5.0 V. If the instrument reads 2.65 V, then absolute error in measurement is

 0.01V
 0.01V
 0.25V
 0.05V

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Measurement and Instrumentation
Which of the quantity consists of unit as kg m/sec ?

 Momentum
 Speed
 Acceleration
 Impulse

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Measurement and Instrumentation
If an inductance is connected in one arm of the bridge and resistance is the remaining three arms

The bridge cannot be balanced
None of the listed here
The bridge can be balanced if the resistance have some specific values
The bridge can always be balanced

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Measurement and Instrumentation
When the pointer of an indicating instrument comes to rest in the final deflected position, ______

Only controlling torque acts
None of the listed here
Only deflecting torque acts
Both deflecting and controlling torques act

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