An aluminium rod join to a copper rod. Each of the rods has length of 20cm and area of cross section 0.2 CM square .The junction is maintained at a constant temperature 40 degree Celsius and the two ends are maintained at 80 degree Celsius. calculate the amount of heat taken out from the cold junction in one minute after the steady state is reached .The conductivity are K aluminium =200W/m-°C and k copper=400W/m-°C
