Compute the magnetic length of a uniform bar magnet if the geometrical length of the magnet is 12 cm. Mark the positions of magnetic pole points.

Explanation

Geometrical length of the bar magnet is 12 cm magnetic length = `(5)/(6) xx` (geometrical length )
`= (5)/(6) xx 12` = 10 cm
In this figure, the dot implies the pole points.