what is magnetic field line
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Magnetic field lines are a visual tool used to represent magnetic fields. They describe the direction of the magnetic force on a north monopole at any given position. One useful analogy is the close connection between magnetic monopoles and electric charges.
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AN AREA AROUND A MAGNET OR MATERIALS THAT BEHAVE LIKE A MAGNET , WHERE THERE IS A FORCE THAT WILL ATTRACT SOME METALS TOWARDS IT.
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