Conventional symbols are used to show different components which are standard across the electrical industry. This makes it quick and easy to construct circuit diagrams - certainly a lot quicker than drawing a picture of it! It also makes it easier to construct real circuits from the drawings.
In this worksheet we'll try working out circuit diagrams from descriptions of circuits, and drawings of them, and we'll also try SERIES and PARALLEL circuits. Series circuits have all the components in a single loop so the same current goes through everything:
Parallel circuits have different branches which means that different components can be on each branch and so can be controlled individually:
Remembering that, let's see how you get on with some circuits including these principles.