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8Sci CH 2 Magnetism
Magnetism
| Question | Answer |
|---|---|
| Magnetic field | area around a magnet where the magnetic force acts |
| Induced magnetism | magnetism that occurs only in the presence of a magnetic field |
| ALNICO | aluminum, nickel, cobalt alloy for permanent |
| Loudspeaker | changes variations in electric current into sound waves |
| Induced current | an electrical current produced by using a magnet |
| Electric generator | changes kinetic energy of rotation into electric energy |
| Transformer | can raise or lower voltage |
| Electric motor | uses an electromagnet to change electric energy into mechanical energy |
| Electromagnet | magnet produced by passing an electric current through a coil of wire wound around a coil |
| Magnetic poles | places where magnetic field is the strongest |
| Transformer | ensures electricity produced by power company has correct voltage by raising or lowering voltage |