t/s | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
v/(m·s-1) | 0 | 2.0 | 4.0 | 5.0 | 5.0 | 5.0 | 5.0 | 5.0 | 4.0 | 3.0 | 2.0 | 1.0 | 0 |
A.内阻约为1Ω、量程为0~30mA的电流表A
B.阻值范围为0~10Ω的滑动变阻器R1
C.阻值范围为0~1000Ω的滑动变阻器R2
D.开关一个、导线若干