Question

What is resistivity?

Answer 1

$\textbf{Hey there}$!

$\textbf{Answer}$:

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The resistance of a conductor depends upon the following factors:

➡It is directly proportional to the length of the conductor i.e

R $\displaystyle \propto$ l.......( 1 )


➡It is inversely proportional to the area of cross - section of the conductor i.e

R = $\displaystyle \propto \frac{l}{A}$.....( 2 )


Combining equations ( 1 ) and ( 2 ).

We get,


R = $\rho \frac{l}{A}$.......( 3 )


where the constant of proportionality $\rho$ is called 'the electrical resistivity' or specific resistance of the conductor.


Its value depends upon the nature of the material of the conductor and it's temperature.


The equation( 3 ) gives the resistance of a conductor in terms of length, area and cross section and resistivity of a material.

$\underline{Units\: of\: resistivity}$ :

The S.I unit of resistivity is ohm metre.


#Be Brainly.

Answer 2

Hey mate

Here is your answer

a measure of the resisting power of a specified material to the flow of an electric current.

Hope this helps u