A current is passed in the conductor in downward direction and the cardboard is gently tapped show the setting of iron fillings on the card board and draw arrows to represent the direction of magnetic field lines
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A current is passed in the conductor in downward direction and the cardboard is gently tapped show the setting of iron fillings on the card board and draw arrows to represent the direction of magnetic field lines .
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Explanation:
a current carrying conductor in down ward direction and the cardboard is gently tapped shows the setting of iron fillings on cardboard like aa.. following
there is diagram see in Google because my not working so..
when a current conductor shows down ward then the cardboard up side there r iron fillings then they may conduct electric city or may attract to magnet
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