What happens to speed and current of d.c motor if there is sudden slight drop in the mains voltage?

Q.  D.C. series motors are used in electric traction. What happens to the speed and current of d.c motor if there is sudden slight drop in the mains voltage?
- Published on 21 Oct 15

a. Speed decreases and current also decreases
b. Speed decreases and current increases
c. Speed increases and current decreases
d. Speed decreases and current remains same

ANSWER: Speed decreases and current remains same

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