The Attempt at a Solution
I know how to do A this is an easy question. I'm not sure how to do B.
For A there are two essential nodes. There are seven nodes.
For B I'm not sure. I always drew my current so that way it went from positive to negative (this is after all the direction of current I believe). This creates a problem because when I try to solve the problem using the node voltage method I get about 1.714 for the top essential node which I'm not sure if it's right or anything but it seems a little bit off.
I don't understand why the right most branch with the current source... why is it that the whole branch is regulated to be 1 A even before the current source and before the 1 ohm resistor but after the node? This never made much sense to me.
I am also not sure how to solve using the node voltage method because I called the top essential node node voltage 1
(V1 - 6)/2
is a correct way to the difference in voltage between V1 and the bottom essential node for the reference node which I put a ground. At least I think it is but I'm not sure how to deal with the 1 ohm resistor before the 6V voltage source in my calculations.
Check the second attachment for my drawings of current etc.
As you can see all the currents go into the top essential node which is a problem.
Thanks for any help at all.