(i) A cylindrical pipe of length L has inner and outer radii as a and b respectively. The inner
Channel: Doubtnut
Date: 2020-02-16

(i) A cylindrical pipe of length L has inner and outer radii as a and b respectively. The inner surface of the pipe is at a temperature `T_(1)` and the outer surface is at a lower temperature of `T_(2)`. Calculate the radial heat current if conductivity of the mate- rial is K. (ii) A cylindrical pipe of length L has two layers of material of conduc- tivity `K_(1)` and `K_(2)`. (see figure). If the inner wall of the cylinder is maintained at `T_(1)` and outer surface is at `T_(2) (lt T_(1))`, calcu- late the radial rate of heat flow.