Mar 8th 2017, 01:56 AM
Join Date: Jun 2016
A slight slip of the keyboard from HallsofIvy:
It is the motion of the magnet through the coil that induces a current...
On a simplistic level you can think of the magnet "pulling" the electrons around to create the current.
I note that in your initial post you mention a ferrous core rather than a magnet,
If you place a ferrous core in a current it will become magnetised,
If you move a magnet in a coil it will produce a current,
If you move a non-magnetised ferrous core in a coil,
then the small naturally occurring magnetism of the core and the coil (in the earths magnetic field) will create small currents.
The key is that these small currents will induce magnetism in the core,
this induced magnetism will reinforce the small currents,
so although you start off with an un-magnetised core in a coil carrying no current, you will end up with magnet in a current.
Last edited by Woody; Mar 9th 2017 at 05:14 AM.