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.
 It consist of two coils mounted at right angles to each other.
 Both B and C.

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Measurement and Instrumentation
Which of following is not correct?

  An electronic voltmeter draw appreciable current from the source.
 A shunt should have a very low resistance.
 Voltmeter should have very high resistance.
 An ammeter should have a very low resitance.

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