mV2 |
R |
mV |
qB |
2L | ||
|
mV |
qB |
2L | ||
|
2qBL | ||
|
1 |
2 |
2q2B2L2 |
3m |
1 |
2 |
1 |
2 |
1 |
3m |
18mqEL+12q2B2L2 |
2q2B2L2 |
3m |
1 |
3m |
18mqEL+12q2B2L2 |
A.粒子在P点所受的电场力一定比磁场力大 | ||||||
B.粒子在P点的加速度为(qE-qυ0B)/m | ||||||
C.粒子在P点的速率为
| ||||||
D.粒子在P点的动能为
|
A.粒子带正电 | ||
B.粒子带负电 | ||
C.粒子由O到A经历时间t=
| ||
D.粒子的速度没有变化 |
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