GEOMETRICAL LENGTH AND MAGNETIC LENGTH

Explanation

The magnetic length is a little less than the geometric length of a magnet. It is approximately 6/7 of the geometric length but in most of the cases we use geometric length same as magnetic length. If we dip a bar magnet completely into iron filings, and then take it out, we will see that a large amount of iron filings will be closer to poles of the magnet, which is slightly inside the end points of the magnet.