Hey all smartie-pants! So this is the problem I have a tough time with: The magnetic field perpendicular to a single 13.2-cm-diameter circular loop of copper wire decreases uniformly from 0.750T to zero. If the wire is 2.25mm in diameter, how much charge moves past a point in the coil during this operation? This is what I was able to come up with: I need to find the circumference, which will give me the length of the wire, which will help me find the resistance of the wire. Knowing that, I can find out the current, which they are looking for? But what about time? Don't I need time to find out the flux?? Thanks so much for any help!!