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Two short magnets having magnetic moment...

Two short magnets having magnetic moments in the ratio `8:1`, when placed on opposite sides of a deflection magnetometer produce no deflection. If distance of stronger magnet from the centre of deflection magnetometer is `6cm`, what is the distance of weaker magnet from the centre?

Text Solution

Verified by Experts

Here, `M_1/M_2=8/1, d_1=6cm d_2=?`
For short magnets, In the null method `M_1/M_2(d_1/d_2)^3=8/1=(2)^3`
`:. d_1/d_2=2, d_2=d_1/2=6/2=3cm`
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