1.

In  a  bar  magnet  is  suspended  vertically  it  does  not  hangin  the  north-south  direction.MSCERT Class 8th General Science Ch4 Magnetism

Answer»

A freely suspended Bar magnet comes to  rest in the N_S direction because

--->The alignment of a freely suspended particles in magnet are influenced by EARTH's magnetic field.

---> Earth is ASSUMED to be a huge strong magnet with its SOUTH pole near its Geographical North pole and North pole at its Geographical south pole.

--> HENCE when suspended freely  the North pole of magnet points TOWARDS geographic north and south pole of bar magnet points Geographic south pole. 

If bar magnet is suspended vertically , then it remains at rest ... Because magnetic particles alignment will not come in effect of earth's magnetic field.



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