Magnets 1
Name a metal that a magnet is attracted to.
CINS
A magnet that keeps its magnetism for a long time
a permanent magnet
Which direction does a compass point to?
North
Name a type of metal that magnet is attracted to.
Cobalt/Iron/Nickel/Steel
This has to flow to get an electromagnet working
What is current
Where is the magnetic force strongest on a magnet?
At the poles
The symbol B represents this
What is Magnetic Field Strength
Name a property all magnets have.
they have 2 poles, exert a force, and are surrounded by a magnetic force
Name an item that uses a permanent magnet.
Many examples allowed
A 1m long wire in a Magnetic field of strength 4 T with 3 A flowing through it produces this Force.
What is 12 N?
How do electromagnets differ from bar magnets?
They need electricity or they can be turned on/off
Can magnets have their magnetic field blocked?
No
How do you make an electromagnet stronger?
What kind of magnet can be made by rubbing a needle with a permanent magnet?
A temporary magnet
A DC Motor does not have a commutator, it gets stuck after this much rotation
What is a quarter turn?
I put the north pole of a magnet near an unknown pole of another magnet. The magnets repel. What do I know about the unknown pole?
It was also a north pole.
If a nail is attracted to a magnet, what can you say about the nail?
That it was made with magnetic material.
How do you magnetize a nail?
rub the nail with one end of a bar magnet repeatedly
What happens when you cut a bar magnet in half?
you get 2 smaller magnets with both a North and a South pole
This Current produces 0.2 N of Force on a 20 cm wire which is in a Magnetic Field strength of 2 T