A bar magnet of length 3 ,cm has point | vedclass

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Question

(a)Both points $ A$  and $B$ lying on the axis of the magnet and on axial position
$B \propto \frac{1}{{{d^3}}}$$&rArr;$ $\frac{{{B_A}}}{{{B_B}}

Vedclass · Accepted Answer

$8$

Vedclass · Answer

(a)Both points $ A$  and $B$ lying on the axis of the magnet and on axial position
$B \propto \frac{1}{{{d^3}}}$$&rArr;$ $\frac{{{B_A}}}{{{B_B}}} = {\left( {\frac{{{d_B}}}{{{d_A}}}} \right)^3} = {\left( {\frac{{48}}{{24}}} \right)^3} = \frac{8}{1}$

A bar magnet of length $ 3 \,cm$ has points $A $ and $ B$ along its axis at distances of $24\, cm$ and $48\, cm$ on the opposite sides. Ratio of magnetic fields at these points will be

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