[" Example "4" In the above example,if temperature of inner surface "P" is kept "],[" constant at "theta_(1)" and of the outer surface "Q" at "theta_(2)(

In the above example, if temperature of inner surface P is kept constant at theta_1 and of the outer surface Q at theta_2(lttheta_1) . Then, Find. (a) rate of heat flow or heat current from inner surface to outer surface. (b) temperature theta at a distance r (altrltb) from centre.

In the above example, if temperature of inner surface P is kept constant at theta_1 and of the outer surface Q at theta_2(lttheta_1) . Then, Find. (a) rate of heat flow or heat current from inner surface to outer surface. (b) temperature theta at a distance r (altrltb) from centre.

Two identical heaters are coated with paint in 1st case e_(1)=1.0 and in 2nd case e_(2)=0.5 Both are kept in identical chambers which are in similar surroundings if the heaters are switched on In steady state 1st heater has temperature T_(1) on surface and theta_(1) of its chamber 2nd heater has temperature T_(2) on surface and theta_(2) of its chamber.

Heat flows radially outwards through a spherical shell of outside radius R_2 and inner radius R_1 . The temperature of inner surface of shell is theta_1 and that of outer is theta_2 . At what radial distance from centre of shell the temperature is just half way between theta_1 and theta_2 ?

Heat flows radially outwards through a spherical shell of outside radius R_2 and inner radius R_1 . The temperature of inner surface of shell is theta_1 and that of outer is theta_2 . At what radial distance from centre of shell the temperature is just half way between theta_1 and theta_2 ?

Show in the figure are two point charge + Q and - Q inside the cavity of the Spherical .shell the changes are kept near the surface of the cavity on opposite sides of the centre of the shell if sigma_1 is the surface charge on the inner surface and Q_1 net charge on it and sigma_2 the surface charge on the outer surface and Q_2 net charge on it then :

Inner surfaec of a cylindrical shell of length l and of material of thermal conductivity k is kept at constant temperature T_(1) and outer surface of the cylinder is kept at constant temperature T_(2) such that (T_(1)gtT_(2)) as shown in figure. heat flows from inner surface to outer surface radially outward. inner and outer radii of the shell are R and 2R resspectively. Due to lack of space this cylinder has to be replaced by a smaller cylinder of length (l)/(2) inner and outer radii (R)/(4) and R respectively and thermal conductivity of material nk. if rate of radially outward heat flow remains same for same temperatures of inner and outer surface i.e., T_(1) and T_(2) then find the value of n.

Two materials having coefficients of thermal conductivity '3k' and 'k' and thickness 'd' and '3d' respectively, are joined to form a slab as shown in the figures. The temperatures of the outer surfaces are theta_(2) and theta_(1) respectively (theta_(2) gt theta_(2)) . The temperature at the interface is :