Figure shows a steel rod joined to a brass rod. Each of the rods has length of `31 cm` and area of cross-section `0.20 cm^(2)`. The junction is maintained at a constant temperature `50^(@)C` and the two ends are maintained at `100^(@)C`. The amount of heat taken out from the cold junction in `10` minutes after the steady state is reached in `n xx 10^(2)J`. Find 'n' the thermal conductivities are `K_(steel) = 46 W//m-^(@)C` and `K_(brass) = 109 W//m-^(@)C`.

Answer

3