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Measurement and Instrumentation

Measurement and Instrumentation
Which of the following is a variable displacement transducer?

 potentiometer
 tachometer
 synchros
None of these

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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?

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

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Measurement and Instrumentation
To measure high frequency currents, we mostly use ______ ammeter.

Thermocouple
Dynamometer
Moving iron
Hot wire

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Measurement and Instrumentation
For measurement of high direct voltage, one would use _____ voltmeter.

Electrostatic
PMMC
Moving iron
Hot wire

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Measurement and Instrumentation
The repeat accuracy of an instrument can be judged from its

Standard deviation of error
Static error
Linearity error
Dynamic error

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Measurement and Instrumentation
Basically potential meter is a device for

Measuring a current
Comparing two currents
Measuring a voltage
Comparing two voltages

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