In D.C. machines, the ________ in field mmf results in increase in size and cost of machines?

Related Mcqs:

The action of electromagnetic machines can be related to which of the following basic principles __________?

A. Induction B. Interaction C. Alignment D. All of the above...

The heated parts of an electrical machine dissipate heat into their surroundings by which of the following modes of heat dissipation ?

A. Conduction B. Convection C. Radiation D. All of the above...

By which of the following methods motor rating for variable load drives can be determined ?

A. Method of average losses B. Equivalent current method C. Equivalent torque method D. Equivalent power method E. All of the above...

The distance between the starts of two consecutive coils measured in terms of coil sides is called_____________?

A. front pitch B. winding pitch C. commutator pitch D. back pitch...

Which of the following in an application of D.C. motors?

A. Traction B. Drives for process industry C. Battery driven vehicles D. Automatic control E. All of the above...