Umm.. yep you are correct. what would have been the current if the polarity of 2Va was reversed?
Do you have any advice on how to deal with two port network problems. I just don't know how to approach the problems for the asked parameters(z,y,h,etc.)
given:
source voltage =120V
voltage across 15 ohm resistor = Va
there is a dependent source 2Va
and a 30 ohm resistor.
I tried applying KVL i.e 120-30I+2Va-Va=0
where Va=15I
and got I=2.66A
whereas my teacher told me that the answer is 8A. how is it so? Is it some basic knowledge that I have...