Mostly, synchronous motors are of_____________?

Related Mcqs:

When V is the applied voltage, then the breakdown torque of a synchronous motor varies as_________?

A. V B. V312 C. V2 D. 1/V...

A synchronous motor connected to infinite bus-bars has at constant full load, 100% excitation and unity power factor. On changing the excitation only, the armature current will have_____________?

A. no change of power factor B. lagging power factor with over-excitation C. leading power factor with under-excitation D. leading power factor with over-excitation...

The maximum power developed in a synchronous motor occurs at a coupling angle of____________?

A. 30° B. 60° C. 90° D. 180°...

An over excited synchronous motor is used for____________?

A. fluctuating loads B. variable speed loads C. low torque loads D. power factor corrections...

A synchronous motor is running with normal excitation. When the load is increased, the armature current drawn by it increases because

A. speed of the motor is reduced B. power factor is decreased C. Eb (back e.m.f.) becomes less than V (applied voltage) D. Er (net resultant voltage) in armature is increased E. none of the above...