U |
R |
U1 |
U2 |
I1RL |
I2RL |
I1 |
I2 |
2 |
3 |
I2 |
I3 |
3 |
5 |
I2 |
I3 |
RL |
RL+R1 |
3 |
5 |
RL |
R1 |
3 |
2 |
I1 |
I3 |
RL |
RL+R1+R2 |
RL | ||
RL+
|
2 |
5 |
RL |
R2 |
6 |
5 |
5 |
2 |
6 |
5 |
15 |
2 |
15 |
2 |
A.电压表V2的示数不变,小灯泡亮度不变 |
B.电压表V2的示数变小,小灯泡亮度变暗 |
C.电压表V1的示数变小,电流表A的示数变小 |
D.电压表V1的示数变大,电流表A的示数变大 |
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