CIRCCIT rill-ORY J.V/) Orr.R.ITlOX.IL C.U.CCI.l'S 



wo 



N'dw write clown KirchhofT's Law, or tlic cirniital oqii.uion fur 

 tlie network of sketch 2. They arc 



{(L.4-/.)^+(/?. + /?3.+ (^. + l)/.4/. 



("oniparison with I'ciiialiims (1) sliows that 



Rii = Ri-\-R3 /?j' = i?2 + /?3 /?i; = /?2i = — 2?J 



1 1.1 ± ^ 1 =_JL 



c... c\\ c,- 





-=1+1 



Go G^G 



It should he oI)Scr\ed that the signs of the mutual cocfticients R^, 

 Li:, Go are a matter of con\ention. F'or example if the conxentional 

 directions of h and Ei are reversed, the signs of the mutual coefficients 

 are reversed. 



r 



— WAV»- 



R? 



AMAV- 1 



The system of equations (1) possesses two important properties 

 which are largely responsible for the relative simplicity of classical 

 electric circuit theory. First, the equations are linear in both currents 

 and applied electromotive forces. Secondly, the coefficients Ljk, 

 Rjk, Cjk are^constants. Important electrotechnical problems exist, 



