問題詳情
59. A man wants to know the magnitude of the magnetic field generated by anoverhead power line. He estimates that a transmission line is about 10 metersabove the ground. The local power company tells him that the line operates at 1 5kV and provides a maximum of 65 MW to the area. Which of the following valuesis closest to the peak current (A）?
(A)500
(B)400
(C)200
(D)50
(E)15
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增