The magnetic moment of a bar magnet is M. If it is cut into two pieces in the ratio 1:2 perpendicular to its length, what is the ratio of their magnetic moments.

Explanation

To solve the problem, we need to understand how the magnetic moment of a bar magnet is affected when it is cut into two pieces. The magnetic moment (μ) of a magnet is given by the formula:

\[ \mu = M \times L \]

where \(M\) is the pole strength and \(L\) is the effective length of the magnet.

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