A spherical shell is electrically heated at the rate of q1 (W/m 2 ) at its inner surface at radius r 1 , and its outer surface dissipates heat by convection with heat transfer coefficient h into an...

A spherical shell is electrically heated at the rate of q1 (W/m²) at its inner surface at radius r₁, and its outer surface dissipates heat by convection with heat transfer coefficient h into an ambient at T_∞. Write boundary conditions at two surfaces of shell.