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Physics
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:
KEAM
KEAM 2003
A
$ 0{}^\circ $
B
$ 45{}^\circ $
C
$ 90{}^\circ $
D
$ 180{}^\circ $
E
any angle with which it is placed
Solution:
Bismuth is a diamagnetic substance, so when placed in an external magnetic field it rotates such that its axis becomes perpendicular to the magnetic field.