What is resistivity and define its SI unit
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Explanation:
Resistivity is defined as the resistance offered by a unit length of conductor having unit area of cross-section . Its S.I. unit is ohm-meter.
Ohm's law is a law stating that electric current is proportional to voltage and inversely proportional to resistance.
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Resistivity=resistance×area of cross section/length
i.e.,row =RA/L
it's S I unit is ohm-metre
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