Magnets

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From: Jhumki Basu (sjbasu@hotmail.com)
Date: Thu Nov 14 2002 - 07:46:46 PST 

From: "Jhumki Basu" <sjbasu@hotmail.com>
Subject: Magnets
Date: Thu, 14 Nov 2002 15:46:46 +0000
Message-ID: <F31Yx3G5aYY61LEdyt3000000be@hotmail.com>

Below are a few questions my students asked when exploring magnets. Perhaps
you have answers?

1. Why do magnets have North and South poles? What's going on inside the
magnet that causes this?
2. Why does north repel north and north attract south?
3. Are magnets used for pain therapy, and, if so, how does this work?
4. How are magnets made? What happens inside a substance that changes it
from non-magnetic to magnetic?
5. Does a battery have a small magnet inside it? Why does a compass move
when a 9V battery is brought close to it?

Thanks!
Jhumki

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