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16. A student fixes a sheet of white paper on a drawing board. He place a bar magnet at the centre ofit. He sprinkles some iron filings uniformly around the bar magnet. Then he taps the board gentlyand observes that the iron filings arrange themselves in a particular pattern.a) Why do the iron filings arrange in a pattern?b) What is indicated by the crowding of iron filings at the end of the magnet?c) What do the lines along which the iron filings align represent?d) Draw a neat diagram to show the magnetic field lines around a bar magnet.e) Write any two properties of magnetic field lines. |
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Answer» a)Due to the force exerted by the magnet within its magnetic field the iron fillings get attracted and arrange themselves in a particular pattern which is given by the magnetic lines of bar magnet. b)Crowding of iron filings at the ends of the magnet indicates that the magnetic field is strongest near the poles of the magnet. c)The lines along which the iron fillings arrange themselves represent magnetic field lines of the bar magnet. e) Properties of magnetic field are as follows:1. They seek the path of least resistance between opposite magnetic poles.2. They flow from the south pole to the north pole within a material and north pole to south pole in air. |
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