A bar magnet 20 cmin length is placed with its south poletowards geographical north the neutralpointsare situatedat a distance of 40 cm from the centre of the magent if H=3.2xx10^(-5)weber/metre^(2) then thepole strength of themagnet is

A bar magnet 20 cmin length is placed with its south poletowards geogr

1.	A bar magnet 20 cmin length is placed with its south poletowards geographical north the neutralpointsare situatedat a distance of 40 cm from the centre of the magent if H=3.2xx10^(-5)weber/metre^(2) then thepole strength of themagnet is
Answer» `9000 ab -axxcm` `900 ab-axxcm` `450ab-axxcm` `225 ab-axxcm` Solution :Sinceneutral POINTS are obtained on axial line ofbar magnet `THEREFORE`for axial line B=H=`(mu_(0))/(4pi)(2m)/(d^(3))` `H=(4ml)/(d^(3))` `(Hd^(3))/(4L)` =m

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A bar magnet 20 cmin length is placed with its south poletowards geographical north the neutralpointsare situatedat a distance of 40 cm from the centre of the magent if H=3.2xx10^(-5)weber/metre^(2) then thepole strength of themagnet is

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