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If a dc shunt motor is stopped by forcing starter handle back to OFF position, then the __________

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If a dc shunt motor is stopped by forcing starter handle back to OFF position, then the __________

(a) dangerous sparking occurs at last stud

(b) dangerous sparking occurs at all stud

(c) it stops normally

(d) heavy sparking

The question was posed to me by my college director while I was bunking the class.

Question is taken from DC Machine Applications in division DC Machines of Electrical Machines

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The correct choice is (a) dangerous sparking occurs at last stud

To explain I would say: The sparking will occur at the last stud not all the studs of the starter.

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