-Circuits are said to be closed when electricity can flow through them and open when electricity stops flowing.
(Circuits; are said; ) (Circuits; to be closed; T:when electricity can flow through them and open; T:when electricity stops flowing) (electricity; can flow; through them) (electricity; flowing; )
Circuits Circuits electricity electricity
are said to be closed can flow flowing
T:when electricity can flow through them and open T:when electricity stops flowing
through them