本题目来源于试卷: Physics Unit20: Magnetism，类别为 通用国际物理
[单选题]
An electron moves with ar m)bz*+o6+ey;glapj speed4 se-9kk6 0c;ia fbazuv:vt c8 of $8.0 \times 10^6 \; m/s$ along the +x axis. It enters a region where there is a magnetic field of 2.5 T, directed at an angle of $60^{\circ}$ to the +x axis and lying in the $xy$ plane. Calculate the magnetic force of the electron.
A. $2.8 \times 10^{-10} \; N$
B. $3.2 \times 10^{-10} \; N$
C. $2.8 \times 10^{-12} \; N$
D. $3.2 \times 10^{-12} \; N$
参考答案: C
本题详细解析:
暂无
| 
