We know that an aluminum will not be magnetized by a magnet..But why is it that when you roll a magnet on an aluminum rod,you will see that the magnet slows down?Meaning, there is magnetism going on.What's the explanation on this?
2007-02-28 08:27:04 · 3 answers · asked by p319 1 in Science & Mathematics ➔ Physics
Aluminum is not ferromagnetic, but it is still a conductor. When a conductor moves in a magnetic field (or when a magnetic field moves in the presence of a conductor), current is produced. By the same token, an electrical current induces a magnetic field. So a moving magnet produces current in the aluminum, which in turn produces a magnetic field, resulting in the drag effect seen on the magnet.
2007-02-28 08:33:53 · answer #1 · answered by DavidK93 7 · 2⤊ 1⤋
The rolling magnet is inducing a current in the aluminium foil.
The induced current produces it's own magnetic field that opposes the field of the magnet.
This is the principal behind magnetic breaking in power tools for example.
I hope this helps a little?!
2007-02-28 17:09:06 · answer #2 · answered by TK_M 5 · 0⤊ 0⤋
there is a positive and negative side 2 a magnet which creates a force around the magnet which attracts any conductor
2007-02-28 16:32:28 · answer #3 · answered by Anonymous · 0⤊ 0⤋