P7 - Magnetism & Electromagnetism Flashcards
1
Q
A permanent magnet…
A
Produces its own magnetic field
2
Q
An induced magnet…
A
Is a material that becomes a magnet when it is placed in a magnetic field.
3
Q
Two unlike poles
A
Attract each other
4
Q
Two like poles
A
Repel each other.
5
Q
What forces are produced when magnets are brought together?
A
Unlike poles = repulsion
Like poles = attraction
(Non-contact forces)
6
Q
A magnetic field is…
A
The region around a magnet where a force acts on another magnet or on a magnetic material.
7
Q
Describe the evidence that the earths core is magnetic.
A
The compass needle points in the direction of the Earths magnetic field
(North - South direction)
8
Q
What are the magnetic materials?
A
Iron, steel (alloy of iron), cobalt, nickel.
