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

 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.
 Both B and C.

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Measurement and Instrumentation
If an inductance L is connected in one arm of bridge and resistance R1, R2, R3 in other three arms

 The bridge can be balanced.
 The bridge can not be balanced.
 The bridge is balanced for some specified value of frequency.
 The bridge is balanced for some specified value of R1, R2, R3.

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