A DC generator without commutator is a

For very sensitive and wide speed control, the preferable control method is

If field current is decreased in a shunt dc motor, the speed of the motor

The emf induced in the dc generator armature winding is

Which of the following windings are necessary in the case of all dc machines?

In a dc machine, 4 pole lap winding is used. The number of parallel paths is?

Equalizer rings are used in which of the following?

Dummy coils are used for

For a dc machine shunt resistance and armature resistance values are

Eddy current loss will depends on