Measurement and Instrumentation
A Manganin swap resistance is connected in series with a moving coil ammeter consisting of a milli ammeter and a suitable shunt in order to

  Minimize the effect of temperature variation.
 Obtaine large deflecting torque.
 Minimize the effect of stray magnetic fields.
 Reduce the size of the meter.

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Measurement and Instrumentation
Which of following statement are correct in case of power factor meter?

 The restoring torque is provided by a controlling torque.
 The deflection is proportional to phase angle between field coil and crossed coil.
 Both B and C.
 It consist of two coils mounted at right angles to each other.

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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.
 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.

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