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 what the symbol means and where it came from. The power symbol ...

A circuit has to have a power source and that is often a cell. The short line of the symbol is the negative terminal. The longer line is the positive terminal. Tip: You don’t have to draw the ...

First we need power, man – this symbol here ... setting off our alarm! Practise drawing the following series circuits using symbols: A simple circuit with a bulb and battery.