What is the Definition of Resistivity and its Relationship to Resistance?

[ghostbuster25]

I am revising for my A levels and I have noticed that a common question on the paper is to define RESISTIVITY.

I have looked and looked but found no definitive description or a good definition.

I know the formula but is it right to just say that "resistivity is directly proportional to a conductors length and inversely proportional to its area. and is the resistance electrons face while flowing through it"

Is there any bette way of writing this?

 

[tiny-tim]

hi ghostbuster25!

I know the formula but is it right to just say that "resistivity is directly proportional to a conductors length and inversely proportional to its area. and is the resistance electrons face while flowing through it"

nooo, that's wrong …

resistance is directly proportional to a conductors length and inversely proportional to its area …

resistivity (like density) isn't proportional to any dimension

i'd start by saying that https://www.physicsforums.com/library.php?do=view_item&itemid=241" is a property of a material, and is the resistance … ​

 

[WatermelonPig]

Resistance = Resistivity * (length/area) where resistivity is a material property.