If the load on a DC shunt motor is increases, its speed is slightly reduced due to______________?
Correct answer: D. decrease in back emf
- A. increase in armature current
- B. increase in flux
- C. decrease in reactance
- D. decrease in back emf
Explanation
An increased load raises armature current, increasing the armature resistance drop. The back emf therefore falls, and with nearly constant shunt flux the speed decreases.
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