Question

help me with question number 12(ii)​

Answer 1

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Electrical resistivity is a measure of a material’s property to oppose the flow of electric current. This is expressed in Ohm-meters (Ω⋅m).

The symbol of resistivity is usually the Greek letter ρ (rho). A high resistivity means that a material does not conduct electric charge well.

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)