The iambic trimeter derives its name from its essential shape, which is three metrical units (hence trimeter) which are each basically iambic in form. The iambic metron has the following shape (where the x is an anceps, the - is a longum, and the u is a brevis):
Hence, reversing the current running though a wire will have the affect of reversing the direction of the magnetic force at a point some distance away from the wire. The affect that this has on the overall magnetic field depends on the shape of the wire.
This will initiate the rotation. The winding will be connected in such a way that the direction of current flow reverses as the unlike poles comes close. Thus the rotor continues to rotate. â. â. There are many different types of electric motors. But the basic principle remains same for all.