Q. A 440-V shunt motor has armature resistance of 0.8 Ω and field resistant 200 Ω. What will be the back e.m.f when giving an output of 7.46 kW at 85 percent efficiency.
A. 567.2 V
B. 345.4 V
C. 425.8 V
D. 645 .34 V
Answer: 425.8V
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