The minimum armature current of the synchronous motor corresponds to operation at______________?

Related Mcqs:

Which of the following resistances can be measured by conducting insulation resistance test on a synchronous motor ?

A. Phase to phase winding resistance B. Stator winding to earthed frame C. Rotor winding to earthed shaft D. All of the above...

In a synchronous motor, the maximum power developed depends on all of the following except:

A. rotor excitation B. maximum value of coupling angle C. direction of rotation D. supply voltage...

The back e.m.f. of a synchronous motor depends on______________?

A. speed B. load C. load angle D. all of the above...

When load on an over-excited or under excited synchronous*motor is increased, rate of change of its armature current as compared with that of power factor is___________?

A. more B. less C. equal D. twice...

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...