CHAPTER 5
Magnetism and Matter
CHAPTER AT A GLANCE
Magnet
A magnet is a material or an object that exhibits a strong magnetic field and has a property to attract some specific materials like iron towards it. The magnetic field is invisible but is responsible for properties of a magnet.
Bar Magnet
A bar magnet consists of two equal and non-separable magnetic poles. One pole is designated as north pole (N) and the other as south pole (S). These poles are separated at a small distance but they are not exactly at the ends.
The distance between two poles of a bar magnet is known as magnetic length of a magnet.
Its direction is from S-pole of the magnet to N-pole and it is represented by 2l. It is sometimes also known as effective length (Le) of the ...
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