A.导线框中的感应电流方向始终不变 | ||
B.外力方向开始沿+x方向,接着沿-x方向,再沿+x方向 | ||
C.外力对线框做功为
| ||
D.通过线框中的电量为
|
| ||
4R |
(Bav)2 |
4R |
a |
v |
B2a3v |
4R |
| ||
4R |
(3Bav)2 |
4R |
a |
v |
9B2a3v |
4R |
11B2a3v |
4R |
11B2a3v |
4R |
△Φ1 |
4R |
Ba2 |
4R |
2Ba2+Ba2 |
4R |
3Ba2 |
4R |
2Ba2 |
4R |
Ba2 |
R |
A. | B. | C. | D. |
1 |
3 |
| ||
2 |
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