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(A) The pole strength of a magnet is a property determined by the cross-sectional area and the intensity of magnetization of the material. When a magn

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Equal

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(A) The pole strength of a magnet is a property determined by the cross-sectional area and the intensity of magnetization of the material. When a magnet is cut perpendicular to its length,the cross-sectional area remains unchanged. Since the material properties and the cross-sectional area do not change,the pole strength of each piece remains the same as that of the original magnet. Therefore,the ratio of the pole strengths of the two sections is $1 : 1$,which means they are equal.

$A$ long magnet is cut into two parts in such a way that the ratio of their lengths is $2 : 1$. The ratio of the pole strengths of both the sections is

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