railway RRB JE (CBT I + CBT II) Mock Test 2024 Heat Transfer Convection Coefficient of Convective Heat Transfer
A flat plate has thickness 5 cm, thermal conductivity 1 W/mK, convective heat transfer coefficients on its two flat faces of 10 W/m2K and 20 W/m2K. The overall heat transfer coefficient for such a flat plate is
1
5 W/m2K
2
6.33 W/m2K
3
20 W/m2K
4
30 W/m2K