Saturday, December 25, 2010

Magnetism and Electricity, Natural Magnet

Magnetism and Electricity
Concept of manetism-molecular theory, magnetic substances, diamagnetic, paramagnetic and ferro magnetic substance-magnets-artificial and natural-protection of magens-properties of magnets-magnetic field methods of making magnets.

The word magnet is derived from the old French word 'magnete', which in turn is dervied from the Latin word. 'magnes'. It means lodestone or magnet. The property of attraction in lodestone gave rise to its use as magnet. Let us now study about magnets.

Natural magnet

Natural magnet occurs as an ore called magnetic. Magnetic has magnetic properties and does not occur in any regular shape. It behaves like a weak magnet

Natural Magnet

Natural Magnet

Do you Know ?
Chinese were the first people to use the property of magnets to construct Mariner's Compass.

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