Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities `k_(1),k_(2),k_(3) and k_(5)`. When points A and C are maintained at different temperature, no heat flows through the central rod if

Five rods of same dimensions are arrranged as shown in the figure. They have thermal conductivities K_(1), K_(2), K_(3), K_(4) and K_(5) . When points A and B are maintained at different themperature, no heat flows through the central rod if

Five rods of same dimensions are arranged as shown in the figure. They have thermal conductivities K _(1) , K_(2) , K _(3) , K_( 4) and K_( 5) . When points A and B are maintained at different temperatures, no heat flows through the central rod if

Three rods of same dimensions are arranged as shown in Fig. They have thermal conductivities K_1 , K_2 and K_3 . The points P and Q are maintained at different temeperature for the heat to flow at the same rate along PRQ and PQ. Whi of the following options correct?

Three rods of same dimension are joined in series having thermal conductivity k_1 , k_2 and k_3 . The equivalent thermal conductivity is

Rate of heat flow through two conducting rods of identiclal dimensions having thermal conductivities K_(1) and K_(2) and Q_(1) and Q_(2) when their ends are maintained at the same difference of temperature individually. When the two rods are joined in series with their ends maintained at the same temperature difference (as shown in the figure), the rate of heat flow 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

Two bar of identical dimensions are kept as shown in figure. If K_1 and K_2 are their coefficients of thermal conductivities, then equivalent K

A cylinder of radius R made of material of thermal conductivity K_(1) is surrounded by a cylindrical shell of inner radius R and outer radius 3R made of a material of thermal conductivity K_(2) . The two ends of the combined system are maintained at two different temperatures. What is the effective thermal conductivity of the system ?

A composite body consists of two rectangular plates of the same dimensions but different thermal conductivities K_A and K_B . This body is used to transfer heat between two objects maintained at different temperatures. The composite body can be placed such that flow of heat takes place either parallel to the interface or perpendicular to it. Calculate the effective thermal conductivities K_(||) and K_(bot) of the composite body for the parallel and perpendicular orientations. Which orientation will have more thermal conductivity ?