to draw the magnetic field lines due to the bar magnet with the help of compass needle
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What you'll do: Place the bar magnet in the middle of the paper. Trace the outline of the magnet – that way you can put it back in the exact same spot if it gets bumped. Place the compass at one pole of the magnet and make a dot next to it showing the direction the compass arrow points
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Magnets have two poles; the field lines spread out from the north pole and circle back around to the south pole. In this activity, you'll watch field lines materialize before your very eyes. The invisible will be made visible thanks to a handful of tiny iron filings.
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