( ( Potential difference ) ( ( is ( measured ( in ( units ( of ( ( Volts ( -LRB- ( V -RRB- ) ) ) ( which ( represents ( ( the work ) ( ( done ( per ( unit charge ) ) ) ( to ( move ( electrons ( between ( the ( ( ( positive and ) negative ) terminals ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Potential) (NN difference)) (VP (VBZ is) (VP (VBN measured) (PP (IN in) (NP (NP (NNS units)) (PP (IN of) (NP (NP (NNP Volts)) (PRN (-LRB- -LRB-) (NP (NNP V)) (-RRB- -RRB-)) (SBAR (WHNP (WDT which)) (S (VP (VBZ represents) (NP (NP (DT the) (NN work)) (VP (VBN done) (PP (IN per) (NP (NN unit) (NN charge))) (S (VP (TO to) (VP (VB move) (NP (NP (NNS electrons)) (PP (IN between) (NP (DT the) (ADJP (JJ positive) (CC and) (JJ negative)) (NNS terminals)))))))))))))))))) (. .)))
Potential difference is measured in units of Volts ( V )which represents the work done per unit charge to move electrons between the positive and negative terminals.
(ROOT (S (NP (NP (DT The) (NN difference)) (PP (IN in) (NP (NP (JJ electric) (JJ potential) (NN energy)) (SBAR (WHNP (WDT which)) (S (VP (VBZ allows) (PP (IN for) (NP (DT an) (JJ electric) (NN charge))) (S (VP (TO to) (VP (VB move) (PP (IN from) (NP (CD one) (NN position))) (PP (TO to) (NP (DT another)))))))))))) (VP (VBZ is) (VP (VBN measured) (PP (IN by) (NP (DT the) (JJ volt) (NN si) (NN unit))))) (. .)))