Whoops. Sorry about that. here goes the OP. Now in the sssf thread about a magnet slowing down when dropped through a copper, or for that matter a non ferrous pipe. I just wanted to square my thoughts away.

There are three inescapable effects of a current in a circuit, Magnetic. Heat & chemical, yeah?

So the reason the magnet is slowed on it’s path downwards is on account of it creating an eddy current & the resulting opposing magnetic field slows its decent.

Is this correct?

Btw. when I said non ferous, I did not nean non conductive. I just meant it could also be aluminium or something non magnetic. :-)

As far as I know yes

The moving magnetic field induces an eddy current in the material

If you moved a bar magnet like wand over the outside of the pipe you’d do the same thing

slow it down even more if the copper pipe formed equiv’ of a shorted turn?

probably has to do with L (inductance) opposing current change, guessing.

BU, correct.

Look up Lenz’s law.

Thanks Sibeen.