Open circuited armature coil of a D.C. machine is________________?

Related Mcqs:

In D.C. generators, the cause of rapid brush wear may be___________?

A. severe sparking B. rough commutator surface C. imperfect contact D. any of the above...

In case of a 4-pole D.C. generator provided with a two layer lap winding with sixteen coils, the pole pitch will be__________________?

A. 4 B. 8 C. 16 D. 32...

For a D.C. machines laboratory following type of D.C. supply will be suitable___________?

A. rotary converter B. mercury are rectifier C. induction motor D.C. generator set D. synchronous motor D.C. generator set...

The number of brushes in a commutator depends on______________?

A. speed of armature B. type of winding C. voltage D. amount of current to be collected...

A sinusoidal voltage of 5 Hz is applied to the field of a shunt generator. The armature voltage wave will_____________?

A. will be zero B. will be of 5 Hz C. will be of 5 xiVHz D. will be of v Hz 5...