In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m.f. in the coil is neutralized by all of the following except Options: A . &nbspInterpoles B . &nbspDummy coils C . &nbspCompensating winding D . &nbspShifting of axis of brushes

In a D.C. generator in order to reduce sparking at brushes, the self-induced e.m

Question

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

Options:

A . Interpoles

B . Dummy coils

C . Compensating winding

D . Shifting of axis of brushes

Answer: Option B

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Question 2. While applying Fleming's right-hand rule to and the direction of induced e.m.f., the thumb points towards....

Question 3. As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately....

Question 4. An exciter for a turbo generator is a....

Question 5. Inter-pole flux should be sufficient to....

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Question 10. The voltage drop for which of the following types of brush can be expected to be least?....

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