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

A slab consists fo two parallel layer of different materials of same thickness and thermal conductivities K_1 and K_2 .The equivalent thermal conductivity off the slab is :

A slab consists of two parallel layers of two different-materials of the same thickness, having thermal conductivities K_1 and K_2 . What is the equivalent thermal conductivity of the slab?

A composite slab is made of two parallel layers of two different materials of thermal conductivities K_1 and K_2 are of same thickness. Show that the equivalent thermal conductivity of the slab is (2K_1 K_2)/( K_1 + K_2)

Two rods of the same length and diameter, having thermal conductivities K_(1) and K_(2) , are joined in parallel. The equivalent thermal conductivity to the combinationk is