1. The problem statement, all variables and given/known data Ordinary motor contain a core with coiled electric wire, this coil have inductance and when the circuit is close the current will rise gradually. (I still understand the concept to this point) After the current rise to a maximun point, the coil have maximum angular acceleration and starts to rotate, then the back e.m.f induced by the turning action opose the voltage source and the current gradually decrease to a steady point. Howerver, my text book saids during this period of current rise, the coil remain at rest due to inertia. I am confused since I think once there are current, there are magnetic force induced, so how can the coil remain at rest at this point?