R2R |
R2+R |
E |
I |
R2R |
R2+R |
R2 |
R2+R |
4 |
5 |
A.当I1=I2时,电源总功率P1=P2 |
B.当I1=I2时,外电阻R1=R2 |
C.当U1=U2时,电源输出功率P出1<P出2 |
D.当U1=U2时,电源内部消耗的电功率P内1<P内2 |
A.BLv;
| B.2BLv;BLv | ||
C.2BLv;2
| D.BLv;2BLv |
r |
2 |
A.BLv0 | B.
| C.
| D.
|
A.φa>φb,2伏 | B.φa>φb,1伏 | C.φa<φb,2伏 | D.φa<φb,1伏 |
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