In this question, I have to determine the power supplied by the 1 A current source. So, using nodal analysis, I determine Vy to be 794/25 V, as given in the solutions.
However, the solution for the power supplied by the current source is the following:
Why is it negative? As I understand it, an element supplies positive power if positive current flows out of the positive voltage terminal. That's what I'm seeing: the current source is pointing upwards where Vy's positive terminal should be (since Vy was found to have a positive voltage with respect to the ground). Am I missing something incredibly obvious or is this solution incorrect?
Thanks for any help in advance.
However, the solution for the power supplied by the current source is the following:
Why is it negative? As I understand it, an element supplies positive power if positive current flows out of the positive voltage terminal. That's what I'm seeing: the current source is pointing upwards where Vy's positive terminal should be (since Vy was found to have a positive voltage with respect to the ground). Am I missing something incredibly obvious or is this solution incorrect?
Thanks for any help in advance.