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Measurement and Instrumentation

Measurement and Instrumentation
The error of an instrument is normally given as a percentage of

Full-scale value
Mean value
Measured value
Rms value

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Measurement and Instrumentation
The transfer instrument which is used for standardization of a polar type AC potentiometer is

 a moving coil instrument.
 a dynamometer instrument.
 a thermal instrument.
 an electrostatic instrument.

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

 tachometer
 potentiometer
None of these
 synchros

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Measurement and Instrumentation
For the AC bridge circuit shown in figure at balance the value of Rd will be

 (Rc/Rb).Ra.
 (Rb/Rc).Ra.
 (Ra/Rc).Rb.
 (Rc/Ra).Rb.

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Measurement and Instrumentation
Relative permittivity can be measured by _______ bridge

 Schering.
 Hays.
 Desautys.
 Wheatstones.

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Measurement and Instrumentation
Kelvin’s double bridge is used to measure low resistance because

 effect of contact and lead resistance is eliminated.
 there is no thermo electric emf.
 it has high sensitivity.
 resistance variation due to temperature.

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