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Small DC motors have best speed control by _________

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Small DC motors have best speed control by _________

(a) armature voltage control

(b) field resistance control

(c) any of the methods

(d) none of the mentioned

I got this question in a job interview.

Query is from Speed Control of DC Motors in division DC Motors of Electrical Machines

1 Answer

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Best answer
Right option is (a) armature voltage control

For explanation: For the small dc motors it is difficult to vary the speed using their field control.

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