The rate of heat flow through a body is $${\text{Q}} = \frac{{{\text{kA}}\left( {{{\text{T}}_1} - {{\text{T}}_2}} \right)}}{{\text{x}}}.$$    The term $$\frac{{\text{x}}}{{{\text{kA}}}}$$ is known as

A. Thermal coefficient

B. Thermal resistance

C. Thermal conductivity

D. None of these

Answer: Option B

Solution(By Examveda Team)

The rate of heat flow through a body is $${\text{Q}} = \frac{{{\text{kA}}\left( {{{\text{T}}_1} - {{\text{T}}_2}} \right)}}{{\text{x}}}.$$    The term $$\frac{{\text{x}}}{{{\text{kA}}}}$$ is known as Thermal resistance.