Measurement and Instrumentation
A PMMC instrument can be used as flux meter

By eliminating the control springs
By using a low resistance shunt
By using a high series resistance
By making control springs of large moment of inertia

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

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

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