What factors limit the size of the back e.m.f.?
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Answer:
The back EMF depends, of course, on the speed of the motor — the change in magnetic flux that generates it increases with motor speed — so that as the motor begins to turn, the back EMF grows until the motor has reached its maximum speed, at which point the back EMF stays at its maximum value
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Answer:
amount of current flowing and resistance of the circuit is the answer to the question
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