s2-4 Thevenin's and Norton's theorems One of the main uses of Thevenin's and norton's theorems is the replacement of a large part of network very simple equivalent. 7 4A 126 36 R (b) ④8 R 8 (c) (d)§2-4 Thevenin's and Norton's theorems One of the main uses of Thevenin' s and Norton's theorems is the replacement of a large part of network very simple equivalent. (a) − + 12V 3 6 RL 7 (b) 3 6 RL 7 4A ( c ) − + 8V 2 RL 7 ( d ) − + 8V 9 RL