( ( ( ( ( They ( may ( sense ( ( the ( magnetic fields ) ) ( that ( surround ( wires ( conducting ( electric current ) ) ) ) ) ) ) ) ) , ) or ) ( they ( prefer ( ( the warmth ) ( ( produced ( by resistance ) ) ( to ( ( the currents ) ( in ( the wires ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (PRP They)) (VP (MD may) (VP (VB sense) (NP (NP (DT the) (JJ magnetic) (NNS fields)) (SBAR (WHNP (WDT that)) (S (VP (VBP surround) (S (NP (NNS wires)) (VP (VBG conducting) (NP (JJ electric) (NN current))))))))))) (, ,) (CC or) (S (NP (PRP they)) (VP (VBP prefer) (SBAR (S (NP (DT the) (NN warmth)) (VP (VBD produced) (PP (IN by) (NP (NN resistance))) (PP (TO to) (NP (NP (DT the) (NNS currents)) (PP (IN in) (NP (DT the) (NNS wires)))))))))) (. .)))
They may sense the magnetic fields that surround wires conducting electric current, or they prefer the warmth produced by resistance to the currents in the wires.
(ROOT (S (PP (IN In) (NP (NP (NN relation)) (PP (TO to) (NP (JJ electrical) (NN current))))) (, ,) (NP (DT a) (JJ narrow) (NN wire)) (VP (MD will) (VP (VB have) (NP (JJR more) (NN resistance)) (PP (IN than) (NP (DT a) (JJ wide) (NN wire))))) (. .)))
In relation to electrical current, a narrow wire will have more resistance than a wide wire.