define electrical resistivity with si unit
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The electrical resistivity of a material is defined as the resistance offered to current flow by a conductor of unit length having unit area of cross section
The unit of ρ is ohm−m(Ωm)
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The electrical resistivity is the electrical resistance per unit length and per unit of cross-sectional area at a specified temperature. The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m). It is commonly represented by the Greek letter ρ, rho.
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