When drawing diagrams to represent electric
circuits, the following symbols are used. 











*strictly speaking the symbol represents an electric cell and a
group of cells connected together is a battery. 



There are, of course, hundreds of other standard symbols for
components like transistors, integrated circuits etc but the
above will be enough for most of the situations we will consider in
these pages. 



In calculations, unless otherwise stated, we assume that
connecting wires are made of a perfect conductor. 


