149376 The quantities of heat required to raise the temperatures of two copper spheres of radii $r_{1}$ and $r_{2}\left(r_{1}=1.5 r_{2}\right)$ through $1 \mathrm{~K}$ are in the ratio of :

149377 Two slabs are of the thickness $d_{1}$ and $d_{2}$. Their thermal conductivities are $K_{1}$ and $K_{2}$ respectively. They are in series. The free ends of the combination of these two slabs are kept at temperatures $\theta_{1}$ and $\theta_{2}$. Assume $\theta_{1}>\theta_{2}$. The temperature $\theta$ of their common junction is

149378 The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the figure, what will be the temperature at the junction of copper and steel ?

149379 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 :

149376 The quantities of heat required to raise the temperatures of two copper spheres of radii $r_{1}$ and $r_{2}\left(r_{1}=1.5 r_{2}\right)$ through $1 \mathrm{~K}$ are in the ratio of :

149377 Two slabs are of the thickness $d_{1}$ and $d_{2}$. Their thermal conductivities are $K_{1}$ and $K_{2}$ respectively. They are in series. The free ends of the combination of these two slabs are kept at temperatures $\theta_{1}$ and $\theta_{2}$. Assume $\theta_{1}>\theta_{2}$. The temperature $\theta$ of their common junction is

149378 The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the figure, what will be the temperature at the junction of copper and steel ?

149379 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 :

149376 The quantities of heat required to raise the temperatures of two copper spheres of radii $r_{1}$ and $r_{2}\left(r_{1}=1.5 r_{2}\right)$ through $1 \mathrm{~K}$ are in the ratio of :

149377 Two slabs are of the thickness $d_{1}$ and $d_{2}$. Their thermal conductivities are $K_{1}$ and $K_{2}$ respectively. They are in series. The free ends of the combination of these two slabs are kept at temperatures $\theta_{1}$ and $\theta_{2}$. Assume $\theta_{1}>\theta_{2}$. The temperature $\theta$ of their common junction is

149378 The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the figure, what will be the temperature at the junction of copper and steel ?

149379 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 :

149376 The quantities of heat required to raise the temperatures of two copper spheres of radii $r_{1}$ and $r_{2}\left(r_{1}=1.5 r_{2}\right)$ through $1 \mathrm{~K}$ are in the ratio of :

149377 Two slabs are of the thickness $d_{1}$ and $d_{2}$. Their thermal conductivities are $K_{1}$ and $K_{2}$ respectively. They are in series. The free ends of the combination of these two slabs are kept at temperatures $\theta_{1}$ and $\theta_{2}$. Assume $\theta_{1}>\theta_{2}$. The temperature $\theta$ of their common junction is

149378 The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the figure, what will be the temperature at the junction of copper and steel ?

149379 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 :