v0 |
v |
1 |
2 |
1 |
2 |
v | 20 |
3m
| ||
2q |
mv2 |
r |
2mv0 |
qB |
| ||
qB |
2πm |
qB |
π-θ |
2π |
2πm |
3qB |
(3
| ||
3qB |
3m
| ||
2q |
2mv0 |
qB |
(3
| ||
3qB |
A.若磁场方向垂直纸面向外,并且磁感应强度增大时,杆ab将向右移动 |
B.若磁场方向垂直纸面向外,并且磁感应强度减小时,杆ab将向右移动 |
C.若磁场方向垂直纸面向里,并且磁感应强度增大时,杆ab将向右移动 |
D.若磁场方向垂直纸面向里,并且磁感应强度减小时,杆ab将向右移动 |
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