circuit : [1] A source of electricity ( battery ), a resistance unit ( headlight , etc.) and wires that form a path for the flow of electricity from the source through the unit and back to the source.
(1] A source of electricity ( battery ), a resistance unit ( headlight , etc.) and wires; form; a path for the flow of electricity from the source through the unit and back to the source)
1] A source of electricity ( battery ), a resistance unit ( headlight , etc.) and wires
form
a path for the flow of electricity from the source through the unit and back to the source