本题目来源于试卷: Electrostatic Force and Electric Field，类别为 美国物理杯赛(Physics Bowl)
[单选题]
09.38: A small object of 7z go xu7t+g 3xi,pse pk2(cu; mass M and charge Q is conn xaf.fi e,hn y,o5vw)1ected to an insulating massless string in a vacuum on Earth. A uniform electric field exist ,a1yo.5xv ff) ,nwhi es throughout the region of the vacuum as indicated. The mass remains in static equilibrium at an angle of θ with the vertical as shown in the figure. When the string is cut, which of the illustrated paths best indicates the trajectory of the mass?
A.
B.
C.
D.
E.
参考答案: B
本题详细解析:
暂无
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