In a conductor, if the number of conduction electrons per unit volume is 8.5 × 10^28 m⁻³ and mean free time is 25 fs (femtosecond), it's approximate resistivity is?
10⁻⁷Ωm
10⁻⁵Ωm
10⁻⁶Ωm
10⁻⁸Ωm
Solution:
Correct option is D. 10⁻⁸Ωm ρ = m/ne²τ = 1.67 × 10⁻⁸Ωm.