△Φ |
△t |
B1 |
t0 |
Lx0 |
2 |
E |
2R |
| ||
4Rt0 |
F |
m |
| ||
4mRt0 |
1 |
2 |
1 |
2 |
v | 20 |
△Φ |
△t |
B1Lx0 |
t0 |
B1Lv0 |
2 |
E |
2R |
1 |
4R |
B1Lx0 |
t0 |
B1Lv0 |
2 |
B0Lv |
2R |
B02L2v |
2R |
B02L2v |
2mR |
-B02L2v |
2mR |
1 |
2 |
B02L2 |
2mR |
-B02L2 |
2mR |
mRv0 | ||
|
1 |
2 |
△Φ |
△t |
E |
2R |
△Φ |
2R |
B1Lx0 |
2 |
mRv0 |
B0L |
mv0 |
2B0L |
B1Lx0 |
4R |
| ||
4mRt0 |
1 |
2 |
v | 20 |
1 |
4R |
B1Lx0 |
t0 |
B1Lv0 |
2 |
mv0 |
2B0L |
B1Lx0 |
4R |
A.滑块在运动过程中所受Q的静电引力先小于滑动摩擦力,后大于滑动摩擦力 | ||||
B.滑块在运动过程的中间时刻,瞬时速度的大小等于
| ||||
C.此过程中产生的内能为
| ||||
D.a、b两点间的电势差为
|
4 |
3 |
7
| ||
80 |
q1q2 |
r |
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