1. The problem statement, all variables and given/known data A circular loop made from a flexible, conducting wire is shrinking. Its radius as a function of time is . The loop is perpendicular to a steady, uniform magnetic field B . Find an expression for the induced ε in the loop at time t. Give your answer in terms of , , t, B and appropriate constants. 2. Relevant equations Magnetic Flux (Φm)=A*B I(induced) = ε / R ε =Absolute value of (dΦ/dt) 3. The attempt at a solution At first get the magnetic flux using the Area * Magnetic field. Area is (pi)r^2 * B. I use this in faradays law with dt but i dont get the write expression. I end up getting ε(t)=(B(pi)(r_0*e^(beta*t))^2)/t I know im differentiating somewhere wrong but i dont know where.