If residual magnetism is present in a D.C. generator, the induced e.m.f. at zero speed will be____________?

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...

Eddy currents are induced in the pole shoes of a D.C. machine due to______________?

A. oscillating magnetic field B. pulsating magnetic flux C. relative rotation between field and armature D. all above...

Which of the following D.C. generators will be in a position to build up without any residual magnetism in the poles?

A. Series generator B. Shunt generator C. Compound generator D. None of the above...

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...