Question

_____ is the equation for unsteady state heat conduction through solid materials.

(a) dT/dx= α (d^2 T)/ (dt)^2

(b) dT/dx= α (d^2 T)/ (dx)^2

(c) dT/dt= α (d^2 T)/ (dx)^2

(d) dT/dt= α (d^2 T)/ (dt)^2

I had been asked this question during an internship interview.

My question is taken from Unit Operations topic in section Heat Transfer by Conduction, Convection and Radiation of Food Engineering

Answer 1

The correct choice is (c) dT/dt= α (d^2 T)/ (dx)^2

Easy explanation: dT/dt= α (d^2 T)/ (dx)^2  is the equation for unsteady state heat conduction through solid materials.