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.
You know the wave is moving in the negative y direction and the electric field is orientated in the positive x direction so it follows that the magnetic field is orientated in the positive z direction. And the orientation of the magnetic field will follow te same sign as the electric field. sc0ttocs Â· 9 years ago.