1. The problem statement, all variables and given/known data 2. Relevant equations 3. The attempt at a solution First part is easy . Area of the triangular loop is A = (1/2)(2R)(R) = R2 Induced EMF in loop ABC = Rate of change of flux = dΦ/dt = AdB/dt = R2(dB/dt) which is correct . Now the second part has stumped me . I would really appreciate if somebody could help me with this . Thank you .