( ( ( ( ( ( ( The difference ) ( with ( parallel circuits ) ) ) ( is ( that ( they ( ( contain ( ( ( more ( than one ) ) path ) ( for electricity ) ) ) ( to flow ) ) ) ) ) ) , ) so ) ( ( if ( ( one ( of ( the paths ) ) ) ( is broken ) ) ) ( , ( ( the ( other paths ) ) ( will ( continue ( to work ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NN difference)) (PP (IN with) (NP (JJ parallel) (NNS circuits)))) (VP (VBZ is) (SBAR (IN that) (S (NP (PRP they)) (VP (VBP contain) (NP (NP (QP (JJR more) (IN than) (CD one)) (NN path)) (PP (IN for) (NP (NN electricity)))) (PP (TO to) (NP (NN flow)))))))) (, ,) (IN so) (S (SBAR (IN if) (S (NP (NP (CD one)) (PP (IN of) (NP (DT the) (NNS paths)))) (VP (VBZ is) (VP (VBN broken))))) (, ,) (NP (DT the) (JJ other) (NNS paths)) (VP (MD will) (VP (VB continue) (S (VP (TO to) (VP (VB work))))))) (. .)))
The difference with parallel circuits is that they contain more than one path for electricity to flow, so if one of the paths is broken, the other paths will continue to work.
(ROOT (NP (NP (NP (DT A) (JJ parallel) (NN circuit)) (VP (VBZ is) (VP (RBS best) (VBN described) (PP (IN as))))) (: :) (NP (NP (NN electricity) (NNS flows)) (PP (IN along) (NP (QP (JJR more) (IN than) (CD one)) (NN pathway))))))