( ( ( The efficiency ) ( of ( ( ( power transfer ) ( -LRB- ( ( ratio ( of ( ( output power ) ( to ( input power ) ) ) ) ) -RRB- ) ) ) ( from ( ( the source ) ( to ( the load ) ) ) ) ) ) ) ( ( increases ( as ( ( the ( load resistance ) ) ( is increased ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN efficiency)) (PP (IN of) (NP (NP (NP (NN power) (NN transfer)) (PRN (-LRB- -LRB-) (NP (NP (NN ratio)) (PP (IN of) (NP (NP (NN output) (NN power)) (PP (TO to) (NP (NN input) (NN power)))))) (-RRB- -RRB-))) (PP (IN from) (NP (NP (DT the) (NN source)) (PP (TO to) (NP (DT the) (NN load)))))))) (VP (VBZ increases) (SBAR (IN as) (S (NP (DT the) (NN load) (NN resistance)) (VP (VBZ is) (VP (VBN increased)))))) (. .)))
The efficiency of power transfer (ratio of output power to input power) from the source to the load increases as the load resistance is increased.
(ROOT (S (NP (NNP Efficiency)) (VP (VBZ equals) (NP (NP (DT the) (NN output) (NN power)) (VP (VBN divided) (PP (IN by) (NP (DT the) (NN input) (NN power)))))) (. .)))