电阻率与电导率换算 Final revision by standardization team on December 10, 2020.
电阻率与电导率换算
电阻R=U I =Ω
电导G=1R =1Ω=S (西门子)=Ω -1
电阻R 与导体的长度L (m )成正比,与导体横截面积S (㎡)成反比
即R ∝L S =ρL S ,ρ为电阻率。
ρ=RS L =Ω?㎡m =Ω *m=S -1*m
因此电导G=1R =1ρ?S L =κ?S L =κ?㎡m =S=Ω-1,κ为电导率
所以κ=1ρ=S*m -1=Ω-1*m -1
纯水电阻率10M Ω*cm ,则相应的电导率为κ=1ρ=110MΩ?cm =1Ω?cm =10-7Ω-1*cm -1 =10-7S*cm -1
=10-4mS/cm
=μS/cm