When you need a multimeter for testing electrical equipment around the home, it's vital to know what all those symbols around ...

The scientists are going to show us how electrical energy flows around an electrical circuit ... that produces almost no heat. LED stands for 'Light Emitting Diode'. terminals close Sorry ...

Save guides, add subjects and pick up where you left off with your BBC account. Circuit symbol: the diode symbol consists of a triangle pointing towards a line. The triangle represents the anode ...