Measurement and Instrumentation
The two pressure coils of a single phase power factor meter have

The same dimensions and the same number of turns
The same number of turns but different dimensions
The same dimension but different number of turns
None of these

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Measurement and Instrumentation
A DC potentiometer is the best means available for the measurement of DC voltage because

  It is based on null balance technique.
 It is possible to standardize before a measurement is undertaken.
 The precision in measurment is independent of the type of the defector used.
 None of above.

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