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Measurement and Instrumentation

Measurement and Instrumentation
The internal resistance of Weston standard cell is of order of

 10 ohm.
 1000 ohm.
 1 ohm.
 100 ohm.

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

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

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Measurement and Instrumentation
The use of thermocouple meters for AC measurement leads to scale which is

 expontial.
 linear.
 square law.
 logarithmic.

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Measurement and Instrumentation
The circuit in figure is used to measure the power consumed by the load. The current coil and the voltage coil of the wattmeter have 0.02 Ω and 1000 Ω resistance respectively. The measured power compared to the load power will be

 0.4% less.
 0.4 more.
 0.2% less.
 0.2% more.

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Measurement and Instrumentation
Electrostatic instruments are used as

Ammeters only
Both ammeter and voltmeter
Voltmeters only
Wattmeter only

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

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

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MORE MCQ ON Measurement and Instrumentation

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