What is Resistivity? Write the formula of resistivity. Write the SI unit of resistivity.

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Solution

Resistivity - It is a measure of resistivity power of a specified material to the flow of an electric current.
$R = ρ \frac{L}{A} ρ = \frac{R A}{L}$
where $R =$ resistivity
$A =$ Area of cross section
$L =$ Length of wire
$[ρ] = o h m [\frac{m^{2}}{m}]$
$ρ = o h m . m e t e r [S . I u n i t]$

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