Practical reason behind speed of DC shunt motor is proportional to back emf only is ____________

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answerhappygod
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Practical reason behind speed of DC shunt motor is proportional to back emf only is ____________

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a) Back emf is equal to armature drop
b) Flux is proportional to field current
c) Flux is proportional to armature current
d) Flux is practically constant in DC shunt motors
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