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Considering a human handed control system for the dc motor speed control, if the resistance wire cut out too slowly, then the _____________

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Considering a human handed control system for the dc motor speed control, if the resistance wire cut out too slowly, then the _____________

(a) starting resistance would burn

(b) field winding would burn

(c) speed will rise steeply

(d) any of the mentioned

I had been asked this question in final exam.

Question is taken from DC Motor Starting in section DC Motors of Electrical Machines

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Correct answer is (a) starting resistance would burn

To explain I would say: Due to the slow cut off the resistance the current will be high for a large amount of time and it will cause the machine to burn.

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