Measurement and Instrumentation
An instrument to be used for measurement and control should preferably have

Linear output and fast response
A highly damped response
Non-linear output
Dead zone and dead time

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

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

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