electrostatics and magnetism (also energy)

static electricity

the build up of electric charges, caused by rubbing 2 things together

electric field

a force field created by electric charges that pushes and pulls nearby charges

magnetic field

the invisible force around magnets that attract or repel objects

one theory that causes the earths magnetic field

the liquid in earths outer core creates electric currents that generate magnetic fields

difference between magnetic and geographical north pole

magnetic poles move with magnetic field and geographical pole stays in place

what would happen if you put a magnet on a string

it would face earths magnetic north pole

how does a compass work

the weak magnet needle moves towards the earths magnetic pole and shows what direction its facing

use domain theory to explain why nails can be magnetised

when the tiny domains line up in the same direction it can become magnetised

2 ways magnetism can be weakened or destroyed

heating the magnet and striking the magnet

an electromagnet and how it works

a type of magnet created by passing a current through a coil or wire.

2 uses of electromagnets

electric motors and electric cranes

2 variables the affect the strength of an electromagnet

the amount of coils and the amount of current

energy

energy is the ability to do things