Measurement and Instrumentation
The effect of load resistance is important in measurement of

 both A and B.
 resistance of shunt winding.
 resistance of ammeter.
 resistance of shunt.

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

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

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