Question

list methods of producing magnetic field

Answer 1

U can keep a bar magnet under a cardboard and sprinkle some iron filling above the cardboard..... slightly tap it....then you can see the magnetic field

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Answer 2

methods of producing magnetic fields are as follows: (a) Magnetic field can be produced by placing a permanent magnet or a horse-shoe magnet at the place, where magnetic field is required. (b) Magnetic field is produced around a current carrying straight conductor or a current carrying coil.