P7- Magnetism and Electromagnetism
- Created by: poppystamp
- Created on: 10-03-19 16:48
Magnetism and Electromagnetism
Poles
-There is a North and South pole on a magnet
-These are the points with the strongest magnetic force
-Opposite sides attract (SN, NS)
-The same sides repel (NN, **)
-Magnets are a non contact force- they do not have to touch something to affect it
Permanent Magnets
-They create their own magnetic field
-They attract and repel other magnets
-They cannot be turned on and off
Induced Magnets
-Can be turned on and off
-Only magnetic when in a magnetic field
- Are only attracted to other magnets, not repelled
Therefore you can test whether a magnet is induced or permenant by seeing if it repels another magnet.
Magnetic Fields
-The closer the field lines, the stronger the magnetic field
Solenoids
-These are a wire coiled up into a spring shape
-Each coil has its own small magnetic field
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