A ring consisting of two parts `ADB` and `ACB` of same conductivity k carries an amount of heat `H` The `ADB` part is now replaced with another metal keeping the temperature `T_91)` and `T_(2)` constant The heat carried increases to `2H` What should be the conductivity of the new `ADB` Given `(ACB)/(ADB)=3`
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Consider two rods of same length and different specific heats ( S_1 and S_2 ), conductivities K_1 and K_2 and area of cross section ( A_1 and A_2 ) and both having temperature T_1 and T_2 at their ends. If the rate of heat loss due to conduction is equal then

A rod of length l and cross sectional area A has a variable conductivity given by K=alphaT , where alpha is a positive constant T is temperatures in Kelvin. Two ends of the rod are maintained at temperatures T_1 and T_2(T_1gtT_2) . Heat current flowing through the rod will be

A rod of length l and cross-section area A has a variable thermal conductivity given by K = alpha T, where alpha is a positive constant and T is temperature in kelvin. Two ends of the rod are maintained at temperature T_(1) and T_(2) (T_(1)gtT_(2)) . Heat current flowing through the rod will be

A rod of length l with thermally insulated lateral surface consists of material whose heat conductivity coefficient varies with temperature as k= a//T , where a is a constant. The ends of the rod are kept at temperatures T_1 and T_2 . Find the function T(x), where x is the distance from the end whose temperature is T_1 .

Two rods A and B have lengths l_1 and l_2. Each rod has its ends at temperature T_1 and T_2 Radii fo cross section of the two rods are same. The condition for equal flow of heat through those two rods is (K_1, K_2 are thermal conductivities of two rods)

A window with double-pane is used for insulating a room thermally from outside. It consists of two glass sheets, each of area A and thickness d with a separation x between them. At equilibrium, the room-glass interface and glass-outside interface are at constant temperature of T_r and T_a respectively. What will the rate of heat flow through the window pane? The thermal conductivity of glass and air are K_1 and K_2 , respectively.

Three rods of same cross-section but different length and conductivity are joined in series . If the temperature of the two extreme ends are T_(1) and T_(2) (T_(1)gtT_(2)) find the rate of heat transfer H.

The temperature of the two outer surfaces of a composite slab, consisting of two materials having coefficients of thermal conductivity K and 2K and thickness x and 4x respectively. Temperatures on the opposite faces of composite slab are T_(1) and T_(2) where T_(2)gtT_(1) , as shown in fig. what is the rate of flow of heat through the slab in a steady state?

A composite slab consists of two rectangular slabs of different materials, having coefficients of conductivity 2K and K. The two ends of the slabs are at temperatures T_1 and T_2 (where T_1 gt T_2 ). How will the rate of heat flow depend on a where 3a and a are the lengths of two slabs? Consider that the two slabs have equal thickness.