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

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

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Measurement and Instrumentation
Why is a MISC meter not recommended for DC measurement?

The meter does not respond to DC signals
The error is high due to eddy current effect
The error is high due to hysteresis effect
The meter is calibrated for AC and it’s error for DC would be high

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