§2-1 Nodal analysis 5Q 34 2 24 Ref Re∫ We select one node as a reference node and then define a voltage between each remaining node and the reference node We must apply kcl to nodes 1 and 2 65 a×2 0.7U1-0.2U2=3 U1=5)bsg=0.54 -0.201+.22=2U2=25P3A=5×3=15W 十§2-1 Nodal analysis We must apply KCLto nodes 1 and 2    − + = − = 0 2 1 2 2 0 7 0 2 3 1 2 1 2     . . . . or We select one node as a reference node, and then define a voltage between each remaining node and the reference node.      = − − − + = − + ( 2 ) 1 5 3 2 5 2 2 1 1 1 2          = = . V V 2 5 5 2 1   P W i . A A 5 3 15 0 5 3 5 =  =  = Re f  1  2 3A − 2A 2 1 5  1 Re f  2 3A − 2A 2 1 i 5 5