Measurement and Instrumentation
In figure Z1 = 200∠60° ohm. Z2 = 400∠-90° ohm, Z3 = 300∠0° ohm. Then Z4 for bridge to be balanced is

 300∠90° ohm.
 600∠-150° ohm.
 400∠-90° ohm.
 150∠30° ohm.

ANSWER DOWNLOAD EXAMIANS APP

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

 Both B and C.
 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.

ANSWER DOWNLOAD EXAMIANS APP