試卷名稱:111年 - 111 國立臺灣大學_轉學生招生考試:普通物理學(A)#125314
年份:111年
科目:研究所、轉學考(插大)◆普通物理學
18. Suppose H+ and He2+ particles are injected into the device as shown in the figure from the left hole. Once they come out from the right hole, they immediately enter a region of another 9 uniform magnetic field B'perpendicular to their velocities. What is the ratio of radii of their circular motion rH+/rHe2+ under the field B'?
(A) 2
(B) 1/2
(C) 1/
(D) 4.