E1 |
4R |
B2l2v1 |
4R |
5l |
v1 |
E2 |
4R |
3 |
4 |
B2l3v1 |
4R |
1 |
2 |
v | 21 |
1 |
2 |
v | 22 |
B2l3v1 |
4R |
1 |
2 |
v | 21 |
1 |
2 |
v | 22 |
B2l2v1 |
4R |
5l |
v1 |
3 |
4 |
B2l3v1 |
4R |
1 |
2 |
v | 21 |
1 |
2 |
v | 22 |
A. | B. | C. | D. |
△B |
△t |
△B |
△t |
v0 |
2 |
A. | B. | C. | D. |
A.电压表示数变大,电流表示数变小 |
B.电压表示数变小,电流表示数变大 |
C.电压表和电流表的示数均变大 |
D.电压表和电流表的示数均变小 |
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