mv0 |
qB |
| ||
2 |
mv0 |
qB |
| ||
2 |
2mv0 |
qt |
1 |
4 |
. |
CD |
2mv0 |
qB |
1 |
2 |
qE |
m |
. |
DF |
2 |
2 |
. |
OF |
mv0 |
qB |
| ||
2 |
2mv0 |
qB |
2 |
mv0 |
qB |
| ||
2 |
2 |
mv0 |
qB |
| ||
2 |
2 |
mv0 |
qB |
| ||
2 |
2mv0 |
qt |
mv0 |
qB |
| ||
2 |
2 |
q |
m |
A.a粒子带正电 | B.c粒子带正电 |
C.b粒子带正电 | D.b粒子带负电 |
3m
| ||
2qd |
2tanθ |
1-2tan2θ |
23892 |
23490 |
A.1:1,两内切圆,半径之比为1:45 |
B.4:234,两外切圆,半径之比为45:1 |
C.234:4,两外切圆,半径之比为45:1 |
D.2:90,两内切圆,半径之比为1:45 |
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