at K and K respectively. Obtain expressions for and hence compute (i) the temperature of the junction of the two bars, (ii) the equivalent thermal conductivity of the compound bar, and (iii) the heat current through the compound bar. Fig . Answer Given, L = L = L = .
m, A = A = A = . m K = W m – K – , K = W m – K – , T = K, and T = K. Under steady state condition, the heat current ( H ) through iron bar is equal to the heat current ( H ) through brass bar. So, H = H = H K A K A For A = A = A and L = L = L , this equation leads to K ( T – T ) = K ( T – T ) Thus, the junction temperature T of the two bars is