Answer / hossain

In an armature based dc motor, it will rotate to and fro.
After roatating 180 degree, it will rotate back again 180
degree and so on.

Answer / surendra

dc motor works on principal of f.left hand rule and force is given by f=BIL.B IS PROPORTIONAL TO voltage if supplied voltage is low machine may not get required force to rotate, hence it won't rotate

Answer / k.prakashchandra

In case of shunt motor ,due to the inductance ,the current
will be too low to overcome the inertia and it may act as a
winding warmer.In series motor, rotor may rotate very slowly.

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