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A student fixes a sheet of white paper o...

A student fixes a sheet of white paper on a drawing board. He places a bar magnet in the centre of it. He sprinkles some iron filings uniformly around the bar magnet. Then he taps the board gently and observes that the iron filings arrange themselves in particular pattern.
Why do the iron fillings arrange themselves in a particular pattern ?

A

Why do the iron filings arrange in a pattern ?

B

What do the lines along which the iron filings align represent?

C

What does the crowding of iron filings at the end of the magnet indicate?

D

How does strength of magnetic field is indicates?

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