Magnetism and Electromagnetism - Physics Paper 2 Flashcards
What does a magnet have around it?
A magnetic field
What is a magnetic field?
A region where magnets experience a force acting on them
What type of force is a magnetic force?
A non-contact force
What can a magnetic field be represented by?
A field diagram
How many poles do magnets have?
2
What are the 2 poles called?
North and South
What do the arrows on magnetic field lines point to?
from north to south
What do the direction of magnetic field lines show?
The direction of the force the north pole would feel if it was placed in that location
The stronger the magnetic field at any point…
the closer together the field lines are
What do like poles do?
Repel
What do unlike poles do?
Attract
What’s inside a compass?
A tiny bar magnet
What are the 2 types of magnets?
Permanent and induced
What do permanent magnets do?
They produce their own magnetic fields
What are induced magnets?
Magnetic materials that turn into magnets when they’re in a magnetic field
What happens when you take a magnetic field away from an induced magnet?
It loses its magnetism
What are examples of permanent magnets?
Bar magnets and horseshoe magnets
What are some examples of magnetic materials?
Iron, steel, nickel, cobalt
What happens when a current flows through a wire?
A magnetic field is created around the wire.