mg |
q |
1 |
2 |
1 |
2 |
v2 |
r |
1 |
2 |
| ||
4gL |
mg |
2q |
m
| ||
3gqL2 |
mg |
q |
m
| ||
3gqL2 |
A.速率加倍,周期减半 |
B.速率不变,轨道半径减半 |
C.速率不变,周期加倍 |
D.速率减半,轨道半径不变 |
A.粒子到达y轴的位置一定各不相同 | ||||||
B.磁场区域半径R应满足R≤
| ||||||
C.从x轴入射的粒子最先到达y轴 | ||||||
D.△t=
|
A.1 | B.2 | C.3 | D.4 |
11 |
42 |
A.EkH≠Ekα,TH≠Tα | B.EkH=Ekα,TH=Tα |
C.EkH≠Ekα,TH=Tα | D.EkH=Ekα,TH≠Tα |
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