R2R3 |
R2+R3 |
(R1+R3)R2 |
R1+R2+R3 |
I |
I′ |
P |
P′ |
R′+r |
R+r |
9 |
5 |
U |
U′ |
IR |
I′R′ |
9 |
10 |
IA |
IA′ |
| ||
|
27 |
5 |
A.电流表的示数为0,电压表的示数等于E | ||||
B.电流表的示数等于
| ||||
C.电流表的示数为0,电压表的示数为0 | ||||
D.电流表的示数等于
|
A.A1读数比A2读数小 |
B.A1指针偏转角度比A2指针偏转角度小 |
C.V1读数比V2读数大 |
D.V1指针偏转角度比V2指针偏转角度大 |
A. | B. | C. | D. |
A.灯泡L将变亮 |
B.电压表的示数将增大 |
C.电流表的示数将减少 |
D.电阻R0上消耗的电功率将减小 |
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