L |
2 |
L |
2 |
R |
R+rMN |
2 |
3 |
ε |
R+rMN |
BLv |
6Lr |
Bv |
6r |
B2Lv |
6r |
B2Lv |
6r |
ε |
R+rMN |
B2L2v2R |
R2+4RLr+4L2r2 |
B2L2v2 | ||
R+4Lr+
|
4L2r2 |
R |
3 |
2 |
B2L2v2 |
8Lr |
B2Lv2 |
8r |
L |
2 |
2 |
3 |
B2Lv |
6r |
3 |
2 |
B2Lv2 |
8r |
A.电流表读数变小,电压表读数变大 |
B.电容器C上电荷量减小 |
C.小电泡L变暗 |
D.电源的总功率变大 |
A.理想电压表读数减小 | B.R1消耗的功率增大 |
C.电源消耗的功率减小 | D.理想电流表读数增大 |
△B |
△t |
| ||
s |
A. | B. | C. | D. |
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