Two slabs A and B of different materials but of the same thicknesss are joined end to end to form a composite slab. The thermal conductivities of A and B are `K_(1)` and `K_(2)` respectively. A steady temperature difference of `12^(@)`C is maintained across the composite slab. If `K_(1) = K_(2)/2`, the temperature difference across slabs A is

Two slabs A and B of different materials but of the same thickness are joined end to end to form a composite slab . The thermal conductivities of A and B are K_(1) and K_(2) respectively . A steady temperature difference of 12^(@)C is maintained across the composite slab . If K_(1) =(K_(2))/(2) , the temperature difference across slab A is

A composite slab consists of two slabs A and B of different materials but of the same thickness placed one on top of the other. The thermal conductivities of A and B are k_(1) and K_(2) respectively. A steady temperature difference of 12^(@)C is maintained across the composite slab. If k_(1) = K_(2)//2 , the temperature difference across slab A will be:

Two rods A and B of same length and radius are joined together. The thermal conductivity of A and B are 2K and K. Under steady state conditions, if temperature difference between the open ends of A and B is 36^(@)C , the temperature difference across 'A' is

A slab consists of two layers of different materials of the same thickness and having thermal conductivities K_(1) and K_(2) . The equivalent thermal conductivity of the slab is

A slab consists of two layers of different materials of the same thickness and having thermal conductivities K_(1) and K_(2) . The equivalent thermal conductivity of the slab is

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be

Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K_(1) and K_(2) . The thermal conductivity of the composite rod will be