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CBSE Class 10 Answered

what is resistivity
Asked by alka08156 | 17 Jul, 2021, 07:27: PM
Expert Answer

Resistivity is property of electrically conducting material.
 
Resistivity of the material of given conductor is defined as the resistance of that conductor of unit length and of unit crosssection area
 
if R is resistance of conductor, ρ is resistivity of material, L is length of conductor and A is area of conductor, then we have
 
R = ρ×L/A    or   ρ = R×A/L
 
unit of resistivity  is  ohm × m

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