resistivity

if p=Ra/l then why is p independent of dimensions? and its not constant as it changes with temp so it can't be suitable as a general for a material?

Reply 1

tiddlytom

7

What happens to R if you double the length? Then using the equation you've given, what happens to the resistivity? Likewise for area.

It is not a constant, but that doesn't mean you couldn't give it at a certain temperature or as a function of temperature.

Reply 2

runny4

OP

6

Original post by tiddlytom

What happens to R if you double the length? Then using the equation you've given, what happens to the resistivity? Likewise for area.

It is not a constant, but that doesn't mean you couldn't give it at a certain temperature or as a function of temperature.

thanks

Reply 3

runny4

OP

6

Original post by tiddlytom

What happens to R if you double the length? Then using the equation you've given, what happens to the resistivity? Likewise for area.

It is not a constant, but that doesn't mean you couldn't give it at a certain temperature or as a function of temperature.