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2667838
Magnet
Description
Mind Map on Magnet, created by valtas88 on 06/05/2015.
Mind Map by
valtas88
, updated more than 1 year ago
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Created by
valtas88
over 9 years ago
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Resource summary
Magnet
Natural - dug from earth's crust known as lodestone
Made of magnetite which is a form of iron ore.
Man-Made (Artificial)
Is an object made of magnetic material. A magnetic substance can be made into a magnet
Can pull other objects made of iron or steel
Points in a North-South direction
A magnet exerts pulling force - magnetic force. Strongest part of magnet is at the ends of the magnet known as poles.
Whatever shapes of magnet, still have north and south poles
Shapes, Horseshoe, U-shaped, Rod, Bar, Ring, Button
Poles of magnet - N-Pole or S-Pole
Like poles - N-Pole & N-Pole OR S-Pole & S-Pole. They repel each other
Unlike poles - N-pole & S-pole. They attract each other
Magnetic Force - can pass through non magnetic object such as glass, paper, plastic and water
Strongest at its poles and weakest at the centre of magnet
Strength depends on : 1) distance between the magnet and object; 2) how magnetic the magnet is; 3) weight of object.
Magnet force, is felt outside the magnet - called magnetic field
Strength of Magnets
Made of iron or steel are not strong
Made of steel or mixtures of cobalt and nickel do not lose magnetism easily. Known as permanent magnets
Made of Iron tend to lose magnetism easily
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