1. The problem statement, all variables and given/known data Uploaded the question below , Part B 2. Relevant equations Φ=NBA EMF= (delta)Φ/(delta)t V=IR 3. The attempt at a solution so i found the area (0.25x0.3) and then divided by two (=0.0375m^2) , then found Φ=80x1.4x0.0375=4.2wb However , in the marking scheme they multiplayed by the speed instead of area !!