Hi, the explanation I have been given for how a transformer works is this: The current flows through the primary coil, hence generating a magnetic field around the coil. Imagine that the coil is wrapped in the anticlockwise direction around the soft iron core (and hence current flows anticlockwise), then by the Right Hand Grip Rule, the north pole would point down. Since the soft iron core is square/rectangular, then by extending the magnetic field induced in the core around the core, one can see that the magnetic field now within the core runs anticlockwise as well. By Lenz's Law, the current in the secondary coil will then flow so as to oppose this magnetic field which produced it in the first place. So the coil is wrapped in the clockwise direction (and so current flows clockwise around the core), and the magnetic field generated by the secondary coil now has north pole pointing down. So the magnetic field it induces in the core is clockwise, and is opposed to that generated by the primary coil. That's great and all, but I don't really see how this can be explained using Fleming's Right Hand Rule? I see the magnetic field generated by the primary coil at a particular instant when the current is pointing in that direction to have an upwards direction since it is anticlockwise around the core. But the relative motion of the coil to the magnetic field is downwards. So, by Fleming's Right Hand Rule, doesn't this mean the direction of magnetic field is PARALLEL to the direction of relative motion? So how does this induce an emf in the secondary coil in the first place? Or is there any other way to explain besides Lenz's Law? Sorry if this was damn long.... thanks!!!