Magnetism science test Flashcards
Magnetic metals
Iron,colbalt and nickel
Two north poles of a magnet are brought together
They repel
A north and a south pole are brought together
They attract
How to make a permanent magnet
You can charge it electronically
What does shocking the metal do
Lines up the domains
How do you make an induced magnet
Rubbing another magnet on it
How to de magnetise something
Bash it
Magnetic field lines always go
North to south
How can you plot a magnetic field
Put a compass at the corner of the magnet and mark the point where the needle points connect these points and repeat
Permanent magnets
Have their own magnetic fields
Induced magnets
When a magnetic material is brought into a magnetic field
Where is the magnetic field the strongest
At the north and south poles
How to tell if a piece of metal is a magnet
Bring one of the poles close to the object if it repels it is a magnet
Where is the earths magnetic field strongest
The earths north and south poles (they are different to the geographical ones)
Why does the earth have a magnetic field
To protect us from solar winds and solar radiation
