A.加速度大小为
| ||
B.下滑位移大小为
| ||
C.产生的焦耳热为qBLυ | ||
D.受到的最大安培力大小为
|
E |
R |
BLv |
R |
B2L2v |
mR |
n△Φ |
R+r |
BLs |
R |
qR |
BL |
BLv |
R |
BLv |
R |
B2L2v |
R |
A.ab杆所受拉力F的大小为μmg+
| ||
B.cd杆所受摩擦力为零 | ||
C.回路中的电流强度为BL
| ||
D.μ与V1大小的关系为μ=
|
△B |
△t |
t | 1 |
v | 1 |
t | 2 |
v | 2 |
A.线框两次匀速直线运动的速度之比
| ||||||||||||
B.从
| ||||||||||||
C.从
| ||||||||||||
D.从
|
t | 0 |
B | 0 |
t | 0 |
t | 0 |
t | 0 |
1 |
2 |
t | 20 |
B | 0 |
1 |
2 |
a | 2 |
t | 20 |
1 |
2 |
B | 0 |
t | 20 |
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