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Measurement and Instrumentation

Measurement and Instrumentation
A moving iron instrument can be used for

AC only
None of the listed here
Both DC& AC
DC only

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

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

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Measurement and Instrumentation
In eddy current damping, disc or former is made of a material that is a

Non conductor but magnetic
Conductor but magnetic
Non conductor and non magnetic
Conductor but non magnetic

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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

 0.05V
 0.25V
 0.01V
 0.01V

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Measurement and Instrumentation
A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads

 5 V.
 0 V.
 2 V.
 (2 + √3/2)V.

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Measurement and Instrumentation
A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as

 3750 rev/KWh.
 960 rev/KWh.
 1000 rev/KWh.
 3600 rev/KWh.

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