Where's the North Pole?

Most recent answer: 02/16/2010

We know the bar of magnets have south and north pole at two ends of the bar. I wonder where is the south and north poles if we make magnets be sphere.
- jason (age 23)
The poles are aligned along the direction of the original magnetizing field.  There are several ways of finding them:   You could use a small bar magnet and find out where on the sphere its South Pole is attracted.  You could sprinkle a few iron filings on it and find out where tend to accumulate.  However with this method you don't know which of the two accumulated bunches is North.


(published on 02/16/2010)