1. The problem statement, all variables and given/known data I've got a gap in my understanding of power in circuit. I have a feeling my problem has something to do with sign convention or something. Anyways, here's the question, Two electrical devices are connected at an interface shown below(see figure). Using the reference marks shown in the figure, find the power transferred and state whether the power is transferred from A to B or B to A, when v = -33 V & i = -1.2 mA. 2. Relevant equations [tex]P = IV[/tex] 3. The attempt at a solution Okay, I know that since the current is negative it is simply going in the opposite direction than depicted in the diagram. (See figure) With this I can conclude that the power is being transfered from B to A, correct? Now for the part I'm moreso confused about, the negative voltage. All these means is that the voltage that is being measured has a greater negative potential than the ground node (reference node) right? How do I deal with the negative sign when making calculations in equations such as, [tex]P = IV[/tex] ? Do I simply sneak a negative in like so, [tex]P = -IV[/tex] ? Any clarification on this would be extremly helpful! Thanks again!