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Hi i really need help in this area: I can never figure it out!! I want to know once you have calculated the force etc. When the question asks you to determine the direction that the charge moves in how do u do it?? Please help. Thanks in advance!

Hi I was wondering if someone could please help me with this: Identify the relationship between power, potential difference and current. I've completely forgotten this stuff but i can vaguely remember something like P=VI but I'd like to know if this is right and if anyone has an...