write the activity of second ways for obtaining magnetic field lines
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put magnet in the sand then the particle of the sand will make a pattern ,that pattern will give the geometry of the magnetic field line
i hope it would help you
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Answer:
take a paper and on put some sand particles or any non magnetic light particles.
at the centre of the paper place a bar magnet alligned in North South direction.
after few seconds u will notice that the particles start following a pattern. trace the pattern with a wooden pencil and that will be the line of magnetic field.
hope it may help u.
thank u
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