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Write in the space below each of the circuits whether the bulb or bulbs would be a. Metals are good conductors of electricity because they contain free electrons. Bbc Dickens Collection Malcolm Mckee I Writer I Director I Electrical Conductors Insulators Moroso 9875m Mag Tune Spark Plug Wires Bbc Over Valve Covers Many metals such as copper iron and steel are good electrical conductors. Electrical conductors bbc . Has a low resistance an electrical insulator has a high resistance you can easily find out which materials are conductors and which are insulators using a simple circuit. The bbc is not responsible for the content of external sites. Plastic rubber and wood are shown to be insulators while metal is a conductor of electricity. Ks2 science electricity learning resources for adults children parents and teachers. In physics and electrical...