Measurement and Instrumentation
Swamping resistance is used to compensate

 both A and B.
 error due to temperature true variations.
 error due to strong magnetic field.
 none of these.

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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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