First we need power, man – this symbol here is a cell ... Let’s finish off with the buzzer, to make some noise! But we need the power to flooowww – let’s join it all up with wires.

Well, do you know why power buttons use a symbol that looks like a broken circle with a vertical line down the top? Here’s ...

Electrical energy is easy to move from place to place, using wire or cables. However, electrical energy must be changed into other forms of energy before we can use it. The symbol for power is \(P ...