Rotating Magnetic Fields in the Electric Sea
Year: 2007 Pages: 3
When a magnet is rotated, the vXB component of the Lorentz force will not be invoked on a nearby stationary test particle. The ??A/??t component of the Lorentz force will however be invoked provided that the axis of rotation does not coincide with the magnetic axis. Faraday?fs interpretation of the null electromagnetic effect for the special case of a magnet rotating on its magnetic axis was that the magnetic field does not rotate with it. In this respect Faraday was correct, but he missed out on the real significance of the scenario. The real significance is that the vXB force is not invoked by a rotating magnet irrespective of whether or not the magnetic field is caused to rotate, and hence the velocity term v cannot be considered to be measured relative to the magnetic field. The velocity term in vXB must be measured relative to something else, and since v is zero in the case scenario, that something else is clearly not rotating when a magnet rotates on ANY axis.