問題詳情
30. 當我們利用一電位差 V 來加速一個質量為 m、電荷為- e 的靜止電子後，再利用一垂直於其速度的磁場B加以偏折。請問此電子偏折軌跡的半徑為：
(A) 
(B)
(C) 
(D)
參考答案
答案：C
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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