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For starting a D.C. motor a starter is required because it limits the starting current to a safe value.

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As there is no back e.m.f. at the instant of starting a D.C. motor, in order to prevent a heavy current from flowing though the armature circuit?

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The speed of a D.C. motor can be controlled by varying  1. Its flux per pole 2. Resistance of armature circuit 3. Applied voltage 4. All of the above

asked Mar 20, 2018 in Electrical Machine by Shimroz123

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