A bar magnet has a length of 8cm.

Question:

A bar magnet has a length of $8 \mathrm{~cm}$. The magnetic field at a point at a distance $3 \mathrm{~cm}$ from the center in the broadside-on position is found to be $4 \times 10^{-6} \mathrm{~T}$. Find the pole strength of the magnet.

Solution:

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