1. The problem statement, all variables and given/known data For the situation described in Figure P31.32, the magnetic field changes with time according to the expression B = (8.00t^3 - 4.00t^2 + 0.800) T, and r2 = 2R = 5.00 cm. Figure P31.32 (a) Calculate the magnitude and direction of the force exerted on an electron located at point P2 when t = 2.00 s. 2. Relevant equations E = -0.5r(dB/dt) F = qE + (qv X B) 3. The attempt at a solution E = -0.5r(dB/dt) F = qE + (qv X B) Alright, the force equation should simplify to just F = qE because B is zero outside the circle. When I plug in and get: F = 0.5qr (24t^2-8t) and plug in for the values: q = 1.602 x 10^(-19) r = 0.05m t = 2 I get: 3.204 x 10^(-19) which is wrong... What am I doing wrong here?