伸长量x/10-2m |
2.00 |
4.02 |
5.95 |
8.03 |
10.00 |
弹力F/N |
0.475 |
0.950 |
1.425 |
1.900 |
2.375 |
A.待测电流计G(量程3mA,内阻约为110Ω)
B.电流表A(量程15mA,内阻约5Ω)
C.定值电阻R两个(阻值分别为30Ω、300Ω)
D.滑动变阻器R'(阻值0~9.0Ω)
E.电源E(电动势1.5V,内阻很小)
F.开关S,导线若干