Measurement and Instrumentation
A first order instrument is characterized by

 Time constant only
 Static sensitivity and time constant
 Static sensitivity and damping coefficient
 Static sensitivity, damping coefficient and natural frequency of oscillations

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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.
  It is based on null balance technique.
 None of above.
 The precision in measurment is independent of the type of the defector used.

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