Question

Which of the following expression represents the correct formula for the conductivity in an intrinsic material?

(a) ρ=e(μn+μp )ni

(b) σ=e(μn+μp )ni

(c) σ=1/(e(μn+μp )ni)

(d) ρ=1/(e(μn+μp )ni)

I got this question in unit test.

My doubt is from Conductivity of a Semiconductor in chapter Conduction in Semiconductors of Electronic Devices & Circuits

Answer 1

The correct answer is (b) σ=e(μn+μp )ni

For explanation I would say: Option b is the correct formula.