**EMF in a special loop of wire. Discussion and CHALLENGE**

HI

Thanks for replying. First of all I wish to point out that the Magnetic field is uniform and HORIZONTAL. THe loop is not falling onto the magnet, but it is hanging upright and parallel to the magnets surface.

There are arguments for and arguments against the appearance of an EMF. I will give the "positive" argument. The two horizontal sides are made of magnetically different materials. The local B field inside the Fe side is about twice as strong than in the Cu side. A metallic bar moving in a magnetic field B will develop an EMF given by the product x*v*B, where x is the length, v is the velocity and B the field. Of course the Bs on both horizontal sides ( taken as the bars) are very different and the EMFs subtract each other, which would produce a net EMF force in the loop and a current flowing round it. I challenge the readers to point out a flaw in this argument ( of course doing the experiment would clarify everything!).