Three rods of copper, brass and steel are welded logether to from a Y-shaped atructure The cross-sectional area of each rod is 4 `cm^2` The end of copper rod is maintained at `100^@` C and the ends of the brass and steel rods at `80^@`Cand `60^@` C respectively Assume that there is no loss of heat from the lateral surface of the rods. The lengths of rods are : copper 46 cm brass 13 cm and steel 12 cm
What is the heat current in the copper rod ?
k(Cu)=0.92, k(steel)=0.12 and k(brass)=`0.26cal//cm`-s- `^@C`

Explanation

`1.28cal//s.`