Answer Posted / ashli

when a motor rotates a back emf(E) is induced in the
armature which will oppose the supply voltage(V).. E is
proportional to the speed ie at zero speed there ll be no
back emf.. the current thro' the armature is (V-E)/R; where
R is the armature winding resistance(small value). at the
instant of starting speed is zero and so the value of E.
thus the current = V/R becomes very high.. once it attain
speed E is generated and current falls down

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