A.5:6 | B.6:5 | C.10:3 | D.3:10 |
U |
R |
R1 |
R2 |
| ||
|
U1 |
I1 |
I2 |
U2 |
2 |
1 |
3 |
5 |
6 |
5 |
A.因为I=
| ||||
B.由I=
| ||||
C.对于同一导体来说,U变大时,I也变大,R的值不变 | ||||
D.同种材料,短而粗的导体其电阻一定比长而细的导体小 |
A.甲灯额定功率小于乙灯的额定功率 |
B.甲灯灯丝电阻小于乙灯灯丝电阻 |
C.乙灯两端的实际电压比甲灯两端的实际电压大 |
D.通过甲灯的实际电流比通过乙灯的实际电流大 |
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