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In case of D.C. shunt motors the speed is dependent on back e.m.f. only because | |
A. | back e.m.f. is equal to armature drop [Wrong Answer] |
B. | armature drop is negligible [Wrong Answer] |
C. | flux is proportional to armature current [Wrong Answer] |
D. | flux is practically constant in ac. shunt motors [Correct Answer] |
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