题目
题型:不详难度:来源:
A.“220V 25W” | B.“220V 60W” |
C.“36V 40W” | D.“110V 100W” |
答案
∴灯泡正常发光时的电流:
I1=
P1 |
U1 |
25W |
220V |
I2=
P2 |
U2 |
60W |
220V |
I3=
P3 |
U3 |
40W |
36V |
I4=
P4 |
U4 |
100W |
110V |
则灯“220V 25W”正常发光时电流最小;
故选A.
核心考点
举一反三
A.1.2J | B.1.2W | C.7.5J | D.6.48W |
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