In a tutorial about h parameters of a two port network, I find the below snippet in the image unable to grasp.
According to KVL, the total voltage in a loop is the algebraic sum of the individual voltages. But why in this tutorial (equation 1 in below image) it's given like that? It should be something like V1 = h11 I1 + V2 according to KVL. What does this h12 V2 mean?
The whole tutorial is here.