Helical windings are used in________________?

Related Mcqs:

The efficiency of a machine should be as ____________ as possible to reduce the operating cost?

A. high B. low C. either of the above D. none of the above...

__________is extensively used for those portions of magnetic circuit which carry steady flux and need superior mechanical properties ?

A. Grey cast-iron B. Cast steel C. High carbon steel D. Stainless steel...

By which of the following methods the temperature rise of windings and other parts may be determined ?

A. Thermometer method B. Resistance method C. Embedded temperature detector method D. Any of the above...

The value of exciting or magnetizing current depends upon which of the following factors ?

A. Total m.m.f. required B. The number of turns in the exciting winding C. The way in which the winding is distributed D. All of the above...

The laminations of the armature of a D.C. machine are usually ___________ thick?

A. 0.1 to 0.2 mm B. 0.2 to 0.3 mm C. 0.3 to 0.4 mm D. 0.4 to 0.5 mm...