A student fixes a sheet of white paper, below which a bar magnet is placed at the centre of it. He sprinkles some iron filings uniformly on the paper.Now answer the following question. a) What does he observed? Draw diagram to illustrate your answer. b) Why iron fillings arrange in such pattern. c) Why crowding of iron filings at the end of poles of bar magnet?
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Answer:(i) Due to the force exerted by the magnet within its magnetic field.
(ii) The lines represent magnetic field lines.
(iii) Crowding of iron filings at the ends of the magnet indicates that the magnetic field is strongest near the poles of the magnet.
(iv) The strength of magnetic field is indicated by the closeness of the field lines. Closer the lines, more will be the strength and farther the lines, lesser will be the field strength.
Explanation:
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