The amount of electrical resistance in a wire is inversely proportional to
问题描述：
The amount of electrical resistance in a wire is inversely proportional to
the square of the diameter of the wire.请问是怎样一个关系,如何列式子
答
电阻量与电线的直径的平方成反比.
Suppose R=resistance,d=diameter,then
R(d^2)=C
(C是个arbitrary constant/随意一个常数）