Magnetism Flashcards
What is a magnetic field?
A region where magnetic objects experience a force.
Where is a magnetic field strongest?
At the poles of a magnet.
Magnetic field strength decreases as?
The magnet moves further away.
The direction of a magnetic field is from?
Magnetic field lines are directed from south pole towards the north pole and thus a closed and continuous curve is formed.
If you stroke a piece of iron repeatedly (and in the same direction) with a magnet, you can create what?
A temporary magnet.
When a magnet exerts a pulling force on a material, it ‘attracts’ the material. What do magnets do when they exert a pushing force on a material?
They repel the material.
How might temporary magnets lose their magnetism?
By heating, dropping, smashing.
The South pole of a magnet dangling at the end of a string would point in which direction?
South.
Magnets are usually made of which metal?
Iron.
Electromagnets are temporary magnets. How do we get them to work?
By switching them on.
