1. The problem statement, all variables and given/known data If a current of 3.5 A flows through a wire for 25 minutes, how much charge passes through the wire? I = 3.5 t = 25 min = 1500 seconds 2. Relevant equations P=W/t W=1/2qV P=VI 3. The attempt at a solution If P = W/t and W = 1/2qV then P = qV/2t so (qV/2t) = VI qV = 2tVI q = 2tI q = 2(1500)(3.5) q = 10,500 C ....................... the answer given by my teacher is 5250 C. So somewhere, I'm off by a factor of two. Can someone help me find my error? Or did my teacher make a mistake?