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Measurement and Instrumentation

Measurement and Instrumentation
In two wattmeter method of power measurement if the total power is measured by one wattmeter only then power factor of the system is

 0.
 none of above.
 1.
 0.5.

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Measurement and Instrumentation
If two meters X and Y require 40 mA and 50 mA respectively, to give full scale deflection, then

 X is more sensitive.
 It would not be possible to assess the sensitivity on the basis of the given data.
 Y is more sensitive.
 Both X and Y are equally sensitive.

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Measurement and Instrumentation
The household energymeter is

A recording instrument
None of the listed here
An integrating instrument
An indicating instrument

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Measurement and Instrumentation
A wattmeter reads 30.34 W. The absolute error in the measurement is - 2.22 W. What is the true value of power?

 32.56 W .
 28.12 W.
None of these
 25.45 W.

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Measurement and Instrumentation
The controlling torque of an indicating instrument ______ as the deflection of the moving system increases.

None of the listed here
Decreases
Increases
Remains same

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Measurement and Instrumentation
Systematic errors are

 environmental errors.
All of these
 observational errors.
 instrument errors.

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