1 |
2 |
1 |
2 |
1 |
2 |
1 |
2 |
U |
R |
I1 |
I2 |
| ||
|
U1 |
U2 |
2 |
1 |
P3 |
P4 |
I21R3 |
I22R4 |
I1 |
I2 |
R3 |
R4 |
2 |
1 |
R3 |
R4 |
2W |
0.25W |
8 |
1 |
R3 |
R4 |
2 |
1 |
I1 |
I2 |
R1+R2+R4 |
R1+R3 |
R1+2R1+
| ||
R1+R3 |
2 |
1 |
3 |
2 |
3 |
2 |
3 |
2 |
3 |
2 |
P |
U |
5W |
10V |
1 |
2 |
1 |
2 |
P4 |
I22 |
0.25W |
(0.25A )2 |
A.电流表A的示数变小 |
B.电压表V与电压表V2示数的差值跟电压表V1示数的比值等于1 |
C.电压表V2的示数变小 |
D.电压表V的示数等于电压表V1与V2的示数之和 |
A.电流表的示数不变,电压表的示数不变 |
B.电流表的示数变大,电压表的示数变小 |
C.电流表的示数变大,电压表的示数变大 |
D.电流表的示数变小,电压表的示数不变 |
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