s1
s2
s3
s4
8.20cm
9.30cm
10.40cm
11.50cm
A.电流表A1(量程0.3A,内阻约1.2Ω)
B.电流表A2(量程0.6A,内阻约0.5Ω)
C.电压表V1(量程3V,内阻约3kΩ)
D.电压表V2(量程15V,内阻约15kΩ)
E.滑动变阻器R1(阻值0~10Ω)
F.滑动变阻器R2(阻值0-200Ω)
G.电源E(电动势3V,内阻约0.04Ω)