When the 19 A current through an inductor is turned off in 1.3 ms, an 825 V emf is induced, opposing the change. Which of the following relationships correctly represents the induced emf (E), current (I), and time (t) according to Faraday's law of electromagnetic induction?
(a) E = L (di/dt)
(b) E = (L di) / dt
(c) E = (di) / (L dt)
(d) E = (dt) / (L di)