Electricity Keywords 0.0 / 5 ? PhysicsElectricityIGCSEEdexcel Created by: absarinaaoCreated on: 10-11-14 16:25 Electrical Power The rate at which an appliance transfers energy 1 of 23 Current The rate of flow of charge around the circuit. 2 of 23 Voltage The driving force that pushes the current around 3 of 23 Double Insulated An appliance that has a plastic casing and no metal parts showing. 4 of 23 Electrical Safety Device A device that protects a circuit from damage if too much current flows. 5 of 23 Power Rating The amount of current the appliance will draw from the supply. 6 of 23 Voltage The amount of voltage the appliance will have. 7 of 23 Resistance Anything in the circuit which slows the flow down. 8 of 23 Ammeter Measures current (in amps) flowing through the component. 9 of 23 Voltmeter Measures voltage (in volts) across the component. 10 of 23 Variable Resistor Alters the current flowing through the circuit by varying the resistance. 11 of 23 A.C Main supply. The current is constantly ALTERNATING direction. 12 of 23 D.C Direct Current. The current remains flowing in the SAME direction. 13 of 23 LED Light-emitting diodes.Emits light when current flows through them in the forward direction. 14 of 23 LDR Light-dependant resistor. Changes it's resistance depending on how much light falls on it. 15 of 23 Thermistor Temperature-dependant resistor. Changes it's resistance depending on the temperature. 16 of 23 Series Circuits A circuit where different components are connected in a line end to end. 17 of 23 Parallel Circuits A circuit where each component is separately connected to negative and positive of the supply. 18 of 23 Electrical Conductors Charge easily- current can flow through them. 19 of 23 Electrical Insulators Dont conduct charge very well- current can't flow through them. 20 of 23 Live wire Where the electrical energy travels. 21 of 23 Neutral wire Completes the circuit. 22 of 23 Earth Wire No current flowing through it. Protects you if an appliance develops a fault. 23 of 23
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