Physics · P10
Magnetism and electromagnetism
A magnet does not have to touch anything to act on it — and only one of the things it does is proof that the other object is a magnet too. Follow that from two bars on a track to the field a current makes, and to the motor that field turns.
- 1Magnets and polesContrast
- 2Magnetic fieldsInvestigation
- 3The Earth is a magnetSystem
- 4ElectromagnetsModel
- 5How a motor worksSystem