Question

the usual notation the resistivity of a material is given by a)m/neπ b)neπ/m c)ne²π/m d)m/ne²π​

Answer 1

Question : The usual notation the resistivity of a material is given by,

(a) m/neτ (b) neτ/m (c) ne²τ/m (d) m/ne²τ

solution : The specific resistance or resistivity of a material is given by, ρ = m/ne²τ

where m is mass of material, n is no of electrons per volume, e is charge on electron and τ is time of relaxation.

so the correct option is (D) m/ne²τ

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