Repel and attract
Opposite poles attract to one another:
Same poles repel one another:
Magnetic substances can also be attracted by a magnet
Properties of a magnetic material
Magnetically hard material ---> retains its magnet properties for a long period of time/permanent. hard to demagnetise
Magnetically soft material ---> loses its magnetic properties almost as soon as the magnet field leaves
Magnetic field lines:
- represent shape and direction of magnetic field
- gives an idea of magnetic field
Induced Magnetism;
When a magnet is brought near a magnetic material then the material will acts as a magnet because the magnetic field encourages them to align and form poles. Examples: iron, cobalt and nickel.
The closer the magnet, the stronger the induced magnetism becomes.
Experiments to find the magnetic field pattern of a permanent magnet and two bar magnets:
Can use multiple compasses or iron fillings to see the magnetic field.
Hold two opposite poles close together so that they attract
and makes a uniform magnetic field:
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