A 440V shunt motor has an armature resistance of 0.8Ω field reistnace of 200Ω . Find the back emf when giving an output of 7.46kW at 85 % efficiency?

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Q. A 440V shunt motor has an armature resistance of 0.8Ω field reistnace of 200Ω . Find the back emf when giving an output of 7.46kW at 85 % efficiency?

(A) 222.4v
(B) 425.8v
(C) 312.6v
(D) 392.7v

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✅ Correct Answer: (B) 425.8v

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