Motion of charged particle and Velocity selector and Mass spectrometer (id: 6854

本题目来源于试卷: Motion of charged particle and Velocity selector and Mass spectrometer，类别为 美国物理杯赛(Physics Bowl)

[单选题]
08.36: An electron moves in the plans gv,3h9n*wtx e of the page through two regions of -6mg*elz4k 4b/)xrw1v hyqpfspace along the dotted-line trajectory shown in the figure. There is a uniform electric field inx/z4lpe4vh-gmkfw)* 6br1y q Region I directed into the plane of the page (as shown). There is no electric field in Region II. What is a necessary direction of the magnetic field in regions I and II?
Ignore gravitational forces.

A. Region I is Down the plane of the page Region II is Up the plane of the page
B. Region I is Up the plane of the page Region II is Into the plane of the page
C. Region I is Up the plane of the page Region II is Out of the plane of the page
D. Region I is Down the plane of the page Region II is Out of the plane of the page
E. Region I is Into the plane of the page Region II is Up the plane of the page


参考答案:  C


本题详细解析: 暂无

微信扫一扫，分享更方便