R/W | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 6 | 7.5 |
U/V | 2 | 2.4 | 2.8 | 3.2 | 3.6 | 4 | 4.8 | 6 |
P/W | 1.6 | 1.92 | 2.24 | 2.56 | 2.88 | 3.2 | 3.84 | 4.8 |
A.电源电压为20V |
B.电路中电流为3A |
C.两灯泡消耗的总功率为32W |
D.灯L2的实际功率小于灯L1的实际功率 |
R/Ω | 10 | 15 | 20 | 30 | 50 | 60 |
U/V | 6 | 6 | 6 | 6 | 6 | 6 |
I/A | 0.6 | 0.4 | 0.3 | 0.2 | 0.12 | 0.1 |
P/W | 3.6 | 2.4 | 1.8 | 1.2 | 0.72 | 0.6 |
R/Ω | 2 | 4 | 8 | 10 | 20 | 40 |
U/V | 4 | 4 | 4 | 4 | 4 | 4 |
I/A | 2 | 1 | 0.5 | 0.4 | 0.2 | 0.1 |
P/W | 8 | 4 | 2 | 1.6 | 0.8 | 0.4 |
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