# Calculate the conductivity of germanium, if the conduction electron density is 2×10¹³cm³

## Calculate the conductivity of germanium, if the conduction electron density is 2×10¹³cm³, the electron, and the hole mobilities are 3600 and 1700cm²/V.S respectively.

σ = e n(μₑ + μₕ)

where, e = 1.602176634×10⁻¹⁹C

n = number of charge carrier

μₑ = mobility of electrons

μₕ = mobility of holes

σ = e n(μₑ + μₕ)

= 1.6 x 10 ⁻¹⁹ x 2 x 10¹³(3600 + 1700)

= 16960 x 10⁻⁶

=0.01696 /ohm.cm

Share on: