T0 |
2 |
2R |
T0 |
T0 |
2 |
1 |
2 |
qE |
m |
T0 |
2 |
8mR | ||
q
|
qE |
m |
T0 |
2 |
|
2
| ||
T0 |
m(2v)2 |
r |
1 |
4 |
2πR |
4×2v |
π |
8 |
2πR |
qB |
T |
4 |
π |
8 |
8mR | ||
q
|
2
| ||
T0 |
π |
8 |
A.油滴必带正电荷,电荷量为
| ||||
B.油滴必带负电荷,比荷
| ||||
C.油滴必带正电荷,电荷量为
| ||||
D.油滴带什么电荷都可以,只要满足q=
|
mv0 |
Bq |
3 |
A.只要粒子的速度小于
| ||||
B.只要粒子的速度大于
| ||||
C.只要粒子的速度小于
| ||||
D.速度在
|
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