Question

Which of the following represents the continuity equation?

(a) dp/dt=-(p-p0)/τp+Dp(d^2p/dx^2)-µpd(ρϵ)/dx

(b) dp/dt=-(p-p0)/τp-Dp(d^2p/dx^2)-µpd(ρϵ)/dx

(c) dp/dt=-(p-p0)/τp+Dp(d^2p/dx^2)+µpd(ρϵ)/dx

(d) dp/dt=(p-p0)/τp-Dp(d^2p/dx^2)-µpd(ρϵ)/dx

I have been asked this question during an interview for a job.

My question is from The Continuity Equation in division Conduction in Semiconductors of Electronic Devices & Circuits

Answer 1

Correct answer is (a) dp/dt=-(p-p0)/τp+Dp(d^2p/dx^2)-µpd(ρϵ)/dx

The best explanation: Option a represents the correct equation of the continuity equation for holes.