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Magnetic forces

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Harvey Buckle

on 2 August 2017

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Transcript of Magnetic forces

Magnetic forces
To know the idea of magnetic forces
To chart and plot a magnetic and repulsive field
Bar magnets have two poles:
north pole – normally shown as N
south pole – normally shown as S
Opposite (unlike) poles attract, and like poles repel.
If permanent magnets are repeatedly knocked, the strength of their magnetic field is reduced. Converting a magnet to a non-magnet is called demagnetisation.
Magnets are made from magnetic metals – iron, nickel and cobalt. These are the only pure metals that can be turned into a permanent magnet. Steel is an alloy of iron and so can also be made into a magnet.
Magnetic forces
Bar magnets are permanent magnets. This means that their magnetism is there all the time and cannot be turned on or off as it can with electromagnets.
Watch Mr Harvey
Write down what you did in a set of easy steps
Full transcript