# Homework Help: Resistivity - Need definition

1. Jun 21, 2011

### 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?

2. Jun 21, 2011

### tiny-tim

hi ghostbuster25!
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 …

Last edited by a moderator: Apr 26, 2017
3. Jun 21, 2011

### WatermelonPig

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