问题描述:
如图所示,在直角三角形ABC内充满垂直纸面向外的匀强磁场(图中未画出),AB边长度为d,∠B=π |
6 |
4 |
3 |
A. 粒子在磁场中做匀速圆周运动的周期为4t0
B. 该匀强磁场的磁感应强度大小为
πm |
2qt0 |
C. 粒子在磁场中运动的轨道半径为
2 |
5 |
D. 粒子进入磁场时速度大小为
| ||
7t0 |
最佳答案:
A、带电粒子在磁场中做匀速圆周运动,垂直AC边射出的粒子在磁场中运动的时间是14T,即为:14T=t0,则得周期为:T=4t0,故A正确;B、由 T=4t0,R=mvqB,T=2πRv,得:B=2πmqT=πm2qt0,故B正确;C、运动时间最长的...
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