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

A homopolar generator usually has

In a dc motor the windage loss is proportional to

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

The commutator pitch for simplex wave winding is equal to

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

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

Armature of a dc machine is made of

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

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

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

The developed electromagnetic force and/or torqe in electromechanical energy conversion system act in a direction that tends

Width of a carbon brush should be equal to

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

Wave winding is employed in a dc machine of

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

For a linear electromagnetic circuit,the following statement is true

The commutator pitch for simplex lap winding is

The teeth in the armature of a dc machine are something skewed.This is done to reduce

Laminated yoke in dc motor can reduce