Sparking, is discouraged in a D.C. motor because

Sparking, is discouraged in a D.C. motor because

Q. Sparking, is discouraged in a D.C. motor because

A.            it increases the input power con-sumption

B.            commutator gets damaged

C.            both (a) and (b)

D.            none of the above

Answer: commutator gets damaged

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