A.待测电源
B.电阻箱R(阻值的变化范围为0~999.9Ω)
C,定值电阻R0(阻值为3.0Ω)
D.电流表A(量程为200mA、内阻为6.0Ω)
E.开关S和导线若干
R/Ω |
4.0 |
5.0 |
6.0 |
7.0 |
8.0 |
9.0 |
I/A |
① |
0.125 |
0.108 |
0.102 |
0.091 |
0.084 |
/A-1 | ② | 8.0 | 9.3 | 10.0 | 11.0 | 11.9 |