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Ronan Asked :

25-09-2021 Electrical Machines

Q. At a very low speed, increase in field resistance will _________

A. decrease the speed of motor
B. increase the speed of motor
C. not have signicant effect on speed
D. no effect

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Dapzoi Verified
Commented on 2021-09-25 12:11:20 (IST)
Answer: A

Explanation: At low speed increase in armature current caused by decrease in emf, will not be enough to compensate for decrease in flux in induced torque equation.