問題詳情
(10)A semicircular loop of radius a carries a positive charge Q distributed uniformly. What is the magnitude of the electric field at the loop's center (point P in the right figure)?
(A)
(B)
(C)
(D)
(E)
參考答案
答案：D
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中
(10)A semicircular loop of radius a carries a positive charge Q distributed uniformly. What is the magnitude of the electric field at the loop's center (point P in the right figure)?
答案：D
統計：A:0,B:0,C:0,D:0,E:0
難度：計算中