In a commutator_____________?

Related Mcqs:

The bearings used to support the rotor shafts are generally______________?

A. ball bearings B. bush bearings C. magnetic bearmgs D. needle bearings...

Laminations of core are generally made of________________?

A. case iron B. carbon C. silicon steel D. stainless steel...

The rapid wear of brushes takes place due to____________?

A. abrasion from dust B. excessive spring pressure C. rough commutator bars D. high mica insulation between com-mutation bars E. all of the above factors...

In D.C. generators, lap winding is used for______________?

A. high voltage, high current B. low voltage, high current C. high voltage, low current D. low voltage, low current...

A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly_______________?

A. 150 V B. 175 V C. 240 V D. 290 V...