1. The problem statement, all variables and given/known data The magnetic field perpendicular to a circular loop of wire 23 cm in diameter is changed from +0.52 T to -0.45 T in 175 ms, where + means the field points away from an observer and - toward the observer. 2. Relevant equations (pardon me with the equations, I am LaTeX challenged.) emf = N x (delta flux)/(delta time) emf = Blv 3. The attempt at a solution emf = (1) (.97)/(.175) emf = 5.54 V I have seen this equation with a negative infront...does this need to be put in the answer? This is for a WebAssign. I apologize for the rushed manner in which I posted this, but I have a ton of other work to do. Any help on this is greatly appreciated.