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

Related Mcqs:

If an insulating material is operated beyond the maximum allowable temperature, its life is_____________?

A. drastically increased B. drastically reduced C. unaffected D. none of the above...

Which of the following is an advantage of hydrogen cooling ?

A. Increase in efficiency B. Increase in ratings C. Increase in life D. Smaller size of coolers E. All of the above...

The slot leakage can be calculated by making which of the following assumptions ?

A. The current in the slot conductors is uniformly distributed over their cross-section B. The leakage path is straight across the slot and around the iron at the bottom C. The permanence of air paths is only considered. The reluctance of iron paths is assumed as zero D. All of the above...

In D.C. machines the width of the duct is usually_____________?

A. 4 mm B. 6 mm C. 8 mm D. 10 mm...

The cold rolled grain oriented steel has ___________ permeability in the direction of the grain orientation?

A. minimum B. maximum C. nil D. none of the above...