E |
r+R1+R2 |
10 |
0.4+3.6+R2 |
E | ||
r+R1+
|
R2R3 |
R2+R3 |
R2R3 |
R2+R3 |
R2R3 |
R2+R3 |
R2R3 |
R2+R3 |
16 |
15 |
E |
r+R1+R2 |
10 |
0.4+3.6+16 |
E | ||
r+R1+
|
10 |
5 |
E-E
| ||||||
R3 |
A.外电路电阻增大,路端电压一定增大 |
B.外电路断路时,路端电压为零 |
C.外电路电阻增大,电源的效率一定变大 |
D.外电路电阻增大,电源的输出功率一定变大 |
A.电动势E1=E2,发生短路时的电流I1>I2 |
B.电动势E1=E2,内阻r1>r2 |
C.电动势E1>E2,内阻r1<r2 |
D.当两电源的工作电流变化量相同时,电源2的路端电压变化小 |
A.1320J | B.18J | C.96800J | D.1302J |
A.L1亮度不变,L2变暗 | B.L1变暗,L2变亮 |
C.L1变亮,L2变暗 | D.L1变暗,L2亮度不变 |
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