railway RRB JE (CBT I + CBT II) Mock Test 2024 Heat Transfer Conduction Fourier Law and Thermal Conductivity
A wall of thickness 0.2 m and of thermal conductivity 0.4 W/m-K is having surface area of 1 m2. If the inner and outer temperatures of the wall are 600 °C and 400 °C respectively , the rate of heat transfer will be _______.
1
800 W
2
400 W
3
200 W
4
600 W