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  4. A needle made of bismuth is suspended freely in a magnetic field. The angle which the needle makes with the magnetic field is:

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Q. A needle made of bismuth is suspended freely in a magnetic field. The angle which the needle makes with the magnetic field is:

Jharkhand CECEJharkhand CECE 2005Magnetism and Matter

Solution:

Bismuth is a -diamagnetic substance, hence when placed in an external magnetic field it rotates such that its axis becomes perpendicular to the magnetic field.