The electrical resistivity, or specific resistance, ρ, is the resistance between the opposite faces of a metre cube of a material. The reciprocal of the electrical resistivity is the electrical conductivity. http://www.webelements.com/periodicity/electrical_resistivity/
电阻率单位为Ω·m(欧·米)时,电阻率的倒数称为电导率γ=1/ρ,其单位为 S·m-1(西·米-1)。因此你的电导率为:0.002 S·m-1
大哥你怎么计算的,
电阻率的计算公式为:ρ=RS/L
ρ为电阻率——单位Ω·m
S为横截面积——单位㎡
R为电阻值——单位Ω
L为导线的长度——单位m
50*10^3Ω*10^-2m=500Ω·m.
lder 的结果是对的,电阻率电导率就是这样算的。单位换算在作倒数的时候容易出错。
电阻率的计算公式应该为:ρ=RL/S吧
,
The electrical resistivity, or specific resistance, ρ, is the resistance between the opposite faces of a metre cube of a material. The reciprocal of the electrical resistivity is the electrical conductivity. http://www.webelements.com/periodicity/electrical_resistivity/