In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralised by all of the following except______________?

Related Mcqs:

In case of D.C. machines, mechanical losses are primary function of____________?

A. current B. voltage C. speed D. none of above...

Iron losses in a D.C. machine are independent of variations in_____________?

A. speed B. load C. voltage D. speed and voltage...

The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be_____________?

A. 640 V B. 620 V C. 600 V D. 580 V...

In over compounded generator, full load terminal voltage is______________?

A. almost zero B. less than no load terminal voltage C. more than no load terminal voltage D. equal to no-load terminal voltage...

The series field of a short-shunt D.C. generator is excited by_______________?

A. external current B. armature current C. shunt current D. load current...