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  4. Magnetic field intensity due to a dipole varies as dn; d= distance of observation point from dipole, where n is equal to

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Q. Magnetic field intensity due to a dipole varies as $ {{d}^{n}}; $ $ d= $ distance of observation point from dipole, where n is equal to

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Solution:

Due to a magnetic dipole, $ B\propto \frac{1}{{{d}^{3}}} $ $ n=-\,3 $