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]
11.29: An electron moves withufo88fih m(s0 speed d/+kzpn lb9lz p,ea 3.$1.00× 10^3\: m/s$ as it enters a region of space that has only a uniform magnetic field. The electron is accelerated because of this field with a constant magnitude of $8.00× 10^5\: m/s^2$ for the entire time of $1.00× 10^{−3}s $ that it is in the field. With what speed would the electron exit the field? Ignore gravity.
A. $1.80\times10^3\:m/s$
B. $1.41\times10^3\:m/s$
C. $1.00\times10^3\:m/s$
D. $2.00\times10^3\:m/s$
E. It depends on the initial angle of the electron’s velocity with respect to the magnetic field.
参考答案: C
本题详细解析:
暂无
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