Mains electricity 3.5 / 5 based on 2 ratings ? PhysicsElectricityGCSEAQA Created by: Pea_emmaCreated on: 05-04-13 15:10 An electric current that flows in one direction Direct current (d.c.) 1 of 8 An electric current that reverses its direction of flow repeatedly Alternating current (a.c) 2 of 8 A thin wire that overheats and melts when overloaded to break an electric circuit; comes with different ratings Fuse 3 of 8 A safety device that automatically breaks an electric circuit when it becomes overloaded Circuit breaker 4 of 8 Automatic device for breaking a circuit; based on detecting a difference in current between live and neutral wires Residual current circuit breaker (RCCB) 5 of 8 Electrical appliances that need no earth connection Double insulated 6 of 8 Work done or energy transferred in a given time; units of watts; P = E/t and P = I x V Power 7 of 8 A property of elementary particles; comes in two forms- positive and negative Charge 8 of 8
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