Question

A bar magnet is immersed in a heap of iron filings and pulled out. The amount of iron filing clinging to the:

• A. North pole is almost equal to the South pole.
• B. North pole is much more than the South pole.
• C. North pole is much less than the South pole.
• D. whole magnet will be uniform all along its length.

Answer 1

The correct option is A North pole is almost equal to the South pole.

A bar magnet consists of two poles, North and South pole. Ideally, the magnetic strength of two poles should be the same. So, the amount of iron filings attached to South and North pole will be almost same. Although the amount of iron filings clinging to the whole body other than the poles will not be same. This is because magnetic strength of a magnet reduces from poles towards centre of the magnet.