Question

The resistance of a conductor of length x is r . If it's area of crosssection is a , what is its resistivity ? What is its unit ?
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Answer 1

$\huge{\mathfrak{\pink{Answer}}}$

formula:

$resistivity = \frac{length(resistance)}{area \: of \: cross \: section}$

$resistivity= \frac{x \times r}{a}$

unit:

$\huge{\mathcal{\boxed{\pink{ohm\:metre}}}}$