Heat conducted through per unit area and unit thick face per unit time when temperature difference between opposite faces is unity, is called

A. Thermal resistance

B. Thermal coefficient

C. Temperature gradient

D. Thermal conductivity

Answer: Option D

Solution(By Examveda Team)

A measure of the ability of a material to transfer heat. Given two surfaceson either side of the material with a temperature difference between them,the thermal conductivity is the heat energy transferred per unit time andper unit surface area, divided by the temperature difference. It is measured in watts per degree Kelvin.