Transcription of Chapter Five MAGNETISM AND MATTER
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Chapter Five MAGNETISM AND MATTER
INTRODUCTIONM agnetic phenomena are universal in nature. Vast, distant galaxies, thetiny invisible atoms, humans and beasts all are permeated through andthrough with a host of magnetic fields from a variety of sources. The earth smagnetism predates human evolution. The word magnet is derived fromthe name of an island in Greece called magnesia where magnetic oredeposits were found, as early as 600 BC. Shepherds on this islandcomplained that their wooden shoes (which had nails) at times stayedstruck to the ground. Their iron-tipped rods were similarly affected. Thisattractive property of magnets made it difficult for them to move directional property of magnets was also known since ancienttimes.
magnets ar e br ought close together . Conversely, ther e is an attractive force between the north pole of one magnet and the south pole of the other . (iv) We cannot isolate the north, or south pole of a magnet. If a bar magnet is broken into two halves, we get two similar bar magnets with somewhat weaker properties.
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