Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
MAGNETISM & ELECTRICITY Magnetism • The attraction of one magnet to another Magnetic Pole • The area around the magnet where the magnetic effect is strongest – Like poles repel • South ,South • North ,North – Unlike poles attract • South ,North Magnetic Field • The region of magnetic force around a magnet. – this allows magnets to interact without touching Iron bearing metals • Materials that shows strong magnetic effects – Iron – Nickel – cobalt What is Static Electricity ? • The build up of charge on an object • These charges do not flow • Rubbing certain materials together is a build up of static electricity. • Lightning is static electricity. Benjamin Franklin • Discovered lightning was an electric current and built the first lightning rod. Electric Current • Current: flow of electrons through a material Circuits • A pathway taken by an electric current. – Closed circuits: allow the movement of electrical energy – Open circuits: stop the movement of electrical energy. Circuits • Series Circuit: only one path for current to flow through • Parallel Circuit: more than one path for current to flow through How does electricity move? • Conductors: allow electricity to move through them (metals) • Insulators: do not allow electricity to move through them (rubber, plastic, wood) Electromagnet • Current flowing through a wired that’s been wrapped around an iron-bearing metal. This is a temporary magnet. Michael Faraday Discovered that an electric motor could be made using electricity and magnetism.