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Transcript
Electricity & Magnetism Vocabulary Electricity electrical charge – is a property of matter that tells whether something has a positive or negative charge static electricity – the buildup of electrical charges on an object discharge – the movement of static electricity from on object or another conductors – materials that let charges flow through them easily insulators – materials that do not let charges flow through them easily electrical current – the flow of electrical charges circuit– path along which electric current flows; it has 4 parts: power source (battery), connectors (wires), a switch and the load (lamp, computer, etc..) closed circuit – a complete, unbroken circuit (this enables the light to turn on) open circuit - a circuit that has a break or opening; electric current cannot flow (the light will not turn on) series circuit – all the electrical charges flow in the same direction along the same path parallel circuit - electrical current flows through more than one path pigment - colored substance in an object Magnetism magnet – any object with magnetic force pole – parts of the magnet where the magnetic force is the strongest; magnets have 2 poles: north & south magnetic field – the area of magnetic force around a magnet compass – instrument that uses Earth’s magnetic field to help people find directions electromagnet – is a coil of wire wrapped around a metal core, such as an iron bar. This creates a magnetic field. The metal becomes a magnet (the more wire, the stronger the magnet)