問題詳情

52. The current in an inductor (L = 40 mH) is described by

with I in ampers and t in seconds. What is themagnitude of the emf induced in the inductor at t = 3.0 s?
(A) 2.0 V
(B) 0.080 V
(C) 50 V
(D) 0 V
(E) 4.0 V

參考答案

答案：B
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)