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Magnetic field is a region near a magnetised body where magnetic forces can be detected.
In a magnetic field, the magnetic dipole (Two equal and oppositely magnetised poles separated by a distance is referred to as magnetic dipole) experiences a turning force, which tends to align it parallel to the direction of the field.
Let us understand the concept of magnetic field with the help of an experiment.
| Fix a sheet of paper on a drawing board.
Place a bar magnet at the centre of the sheet.
Sprinkle some iron filings uniformly around the magnet.
Tap the cardboard gently.
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The iron filings experience a force due to the magnet and thus align themselves in a particular pattern. These patterns indicate the magnetic field of the magnet.
A magnetic field is represented graphically by lines of force.
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The iron filings align themselves in a particular pattern which represents the magnetic field lines.
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