Wave winding is employed in a dc machine of

Which of the following is not a part of dc machine?

Armature of a dc machine is made of

In a dc generator,the ripples in the direct emf generated are reduced by employing

The number of parallel paths for a 4-pole duplex lap winding will be

The field coils of a dc generator are usually made of

In a dc motor the windage loss is proportional to

The commutator of a dc motor serves the purpose of

Which of the following are the variable losses in a rotating machine?

Reluctance torque in rotating machines is present,when

Wave winding is composed of

Laminated yoke in dc motor can reduce

In a dc machine armature windind,the number of commutator segments is equal to the number of armature

In electromechanical energy conversion devices(e.g. generators and motors),a small air gap is left between the stator and the rotor ignored to

The commutator pitch for simplex lap winding is

For a linear electromagnetic circuit,the following statement is true

For a 4-pole machine wave winding is impossible with — armature conductors

Minimum number of coils for 400v,6-poles lap connected dc machine for a maximum voltage of 15v between adjacent commutator segments should be

A rotating electrical machine having its self inductance of both the stator and the rotor winding, independent of rotor position will definitely not developed

4 pole generator with 16 coils has a two layer lap winding.The pole pitch is