( ( This law ) ( ( is ( ( based ( on ( ( the conservation ) ( of energy ) ) ) ) ( whereby ( voltage ( is ( defined ( as ( ( the energy ) ( per ( unit charge ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This) (NN law)) (VP (VBZ is) (VP (VBN based) (PP (IN on) (NP (NP (DT the) (NN conservation)) (PP (IN of) (NP (NN energy))))) (SBAR (WHADVP (WRB whereby)) (S (NP (NN voltage)) (VP (VBZ is) (VP (VBN defined) (PP (IN as) (NP (NP (DT the) (NN energy)) (PP (IN per) (NP (NN unit) (NN charge))))))))))) (. .)))
This law is based on the conservation of energy whereby voltage is defined as the energy per unit charge.
(ROOT (S (NP (NNP Voltage)) (VP (VP (VBZ is) (RB not) (NP (NP (DT the) (JJ same)) (PP (IN as) (NP (NN energy))))) (, ,) (CC but) (VP (VBZ means) (NP (NP (DT the) (NN energy)) (PP (IN per) (NP (NN unit) (NN charge)))))) (. .)))