An inductor in the form of a solenoid contains 400 turns, is 15.0 cm in length, and has a cross-sectional area of 3 cm2. What uniform rate of decrease of current through the inductor induces an emf of 175 ?V?
EMF - dΦ/dt -μ?NA/L (di/dt) di/dt - (1.75x10^-4)(0.15) / (4π×10^-7)(400)(3x10^-4) - 174 Amp/sec
