A device used to measure current., Ammeter, The unit for current - symbol A., Amps, The flow of electrons (or other charged particle)., Current, A circuit component that only allows current to flow in one direction., Diode, A thick piece of wire which is designed to 'blow' (actually melt) when the current becomes too large., Fuse, Light dependent resistor. This component's resistance changes when the light level changes., LDR, Light emitting diode. A small bulb-like component that gives off a single colour of light when a voltage is applied., LED, The unit for resistance - symbol Ω ., Ohm, A circuit which has wires that split, or branch off. In this type of circuit the current will also split., Parallel circuit, The rate of use of energy/a measure of how quickly energy is transferred., Power, This reduces the flow of current. The more there is of this, the less current., Resistance, A component that adds resistance to a circuit., Resistor, A circuit which only has one path for the current to flow., Series circuit, This component's resistance changes as the temperature changes., Thermistor, A component which can have its resistance altered using a dial or slider., Variable resistor, The unit for voltage - symbol V., Volt, A device used to measure voltage., Voltmeter, The unit for power - symbol W, Watt

Electric circuits

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