Magnetic Induction

When a piece of unmagnetised magnetic material touches or is brought near to the pole of a permanent magnet, it becomes a magnet itself. The magnetism is induced.
In magnetic induction, a North pole induces a south pole in the nearest end.

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Induced magnets have the same magnetic properties like ordinary magnets.

The strength of an induced magnet increases if
  • a stronger magnet is used.
  • the distance between the magnet and the induced magnet is decreased.
  • the induced magnet is made of a soft magnetic material.

Applications and consequences of induced magnetism
  • In hospitals, strong magnets can be used to induced magnetism in a steel splinter and remove it from a patient's eye.
  • Steel tools and girders in bridges are often slightly magnetised by magnetic induction from the earth's magnetism.