| A | B |
|---|
| magnetite | a rock that is attracted to materials containing iron |
| magnetic field | the region around a magnet where the magnetic force acts |
| magnetic poles | where the magnetic field is the strongest |
| induced magnetism | magnetism that only occurs in the presence of a magnetic field |
| permanent magnets | materials that retain their magnetism for a long period of time |
| electromagnets | powerful magnet which are created by flowing electric current |
| loudspeaker | changes variations in electric current into sound waves |
| commutator | changes current direction in a motor |
| induced current | an electric current produced by using a magnet |
| electric motor | uses an electromagnet to change electric energy into mechanical energy |
| electric generator | changes kinectic energy of rotation into electrical energy |
| transformer | can raise or lower voltages |
| alternating current | current that changes direction |
| domain | groups of atoms with north and south poles aligned together |
| ALNICO | an alloy of aluminum, nickel and cobalt |
