Question

Watt per meter kelvin is the unit of

• A. Stress
• B. Period of revolution of satellite
• C. Angular displacement
• D. Coefficient of thermal conductivity

Answer 1

The correct option is D Coefficient of thermal conductivity

$\frac{Watt}{\left(meter\right)\times \left(kelvin\right)}=\frac{M{L}^2{T}^{-3}}{LK}=ML{T}^{-3}{K}^{-1}$
Coefficient of thermal conductivity $\left(k\right)=\frac{\left(\frac{q}{A}\right)\times t}{dT}$

$\left(q/A\right)=$ heat transfer per unit area$\left(W/m^2\right)$

$dT=$ temperature difference

$t=$ thickness

$\left[k\right]=\frac{\left[M{L}^2{T}^{-3}\right]\left[L^{-2}\right]\left[L\right]}{\left[K\right]}=ML{T}^{-3}{K}^{-1}$