149357 A bi-metallic slab is made (refer figure by fusing two material. The components have same thickness and lengths, but are of thermal conductivities $K_{1}$ and $K_{2}$. If $\left(T_{1}>T_{2}\right)$, the heat were to conduct across the faces $\left(T_{1}>T_{2}\right)$ then effective thermal conductivity of the composite slab is
$\mathrm{T}_{1}$

$\mathrm{T}_{2}$

149358 Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are $K_{1}$ and $K_{2}$ and cross-sectional areas $A_{1}$ and $A_{2}$, respectively. If the rate of heat conduction in 1 is four times that in $\mathbf{2}$, then

149359 A conductor of area of cross-section $100 \mathrm{~cm}^{2}$ and length $1 \mathrm{~cm}$ has coefficient of thermal conductivity $0.75 \mathrm{cal} \mathrm{s}^{-1} \mathrm{~cm}^{-1} \mathrm{~K}^{-1}$. If $3000 \mathrm{cal}$ of heat flows through the conductor per second, the temperature difference across the conductor is

149360 A compound slab is made of two parallel plates of copper and brass of the same thickness and having thermal conductivities in the ratio 4:1. The free face of copper is at $0^{\circ} \mathrm{C}$. The temperature of the interface is $20^{\circ} \mathrm{C}$. What is the temperature of the free face of brass?

149357 A bi-metallic slab is made (refer figure by fusing two material. The components have same thickness and lengths, but are of thermal conductivities $K_{1}$ and $K_{2}$. If $\left(T_{1}>T_{2}\right)$, the heat were to conduct across the faces $\left(T_{1}>T_{2}\right)$ then effective thermal conductivity of the composite slab is
$\mathrm{T}_{1}$

$\mathrm{T}_{2}$

149358 Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are $K_{1}$ and $K_{2}$ and cross-sectional areas $A_{1}$ and $A_{2}$, respectively. If the rate of heat conduction in 1 is four times that in $\mathbf{2}$, then

149359 A conductor of area of cross-section $100 \mathrm{~cm}^{2}$ and length $1 \mathrm{~cm}$ has coefficient of thermal conductivity $0.75 \mathrm{cal} \mathrm{s}^{-1} \mathrm{~cm}^{-1} \mathrm{~K}^{-1}$. If $3000 \mathrm{cal}$ of heat flows through the conductor per second, the temperature difference across the conductor is

149360 A compound slab is made of two parallel plates of copper and brass of the same thickness and having thermal conductivities in the ratio 4:1. The free face of copper is at $0^{\circ} \mathrm{C}$. The temperature of the interface is $20^{\circ} \mathrm{C}$. What is the temperature of the free face of brass?

149357 A bi-metallic slab is made (refer figure by fusing two material. The components have same thickness and lengths, but are of thermal conductivities $K_{1}$ and $K_{2}$. If $\left(T_{1}>T_{2}\right)$, the heat were to conduct across the faces $\left(T_{1}>T_{2}\right)$ then effective thermal conductivity of the composite slab is
$\mathrm{T}_{1}$

$\mathrm{T}_{2}$

149358 Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are $K_{1}$ and $K_{2}$ and cross-sectional areas $A_{1}$ and $A_{2}$, respectively. If the rate of heat conduction in 1 is four times that in $\mathbf{2}$, then

149359 A conductor of area of cross-section $100 \mathrm{~cm}^{2}$ and length $1 \mathrm{~cm}$ has coefficient of thermal conductivity $0.75 \mathrm{cal} \mathrm{s}^{-1} \mathrm{~cm}^{-1} \mathrm{~K}^{-1}$. If $3000 \mathrm{cal}$ of heat flows through the conductor per second, the temperature difference across the conductor is

149360 A compound slab is made of two parallel plates of copper and brass of the same thickness and having thermal conductivities in the ratio 4:1. The free face of copper is at $0^{\circ} \mathrm{C}$. The temperature of the interface is $20^{\circ} \mathrm{C}$. What is the temperature of the free face of brass?

149357 A bi-metallic slab is made (refer figure by fusing two material. The components have same thickness and lengths, but are of thermal conductivities $K_{1}$ and $K_{2}$. If $\left(T_{1}>T_{2}\right)$, the heat were to conduct across the faces $\left(T_{1}>T_{2}\right)$ then effective thermal conductivity of the composite slab is
$\mathrm{T}_{1}$

$\mathrm{T}_{2}$

149358 Two metal rods 1 and 2 of same lengths have same temperature difference between their ends. Their thermal conductivities are $K_{1}$ and $K_{2}$ and cross-sectional areas $A_{1}$ and $A_{2}$, respectively. If the rate of heat conduction in 1 is four times that in $\mathbf{2}$, then

149359 A conductor of area of cross-section $100 \mathrm{~cm}^{2}$ and length $1 \mathrm{~cm}$ has coefficient of thermal conductivity $0.75 \mathrm{cal} \mathrm{s}^{-1} \mathrm{~cm}^{-1} \mathrm{~K}^{-1}$. If $3000 \mathrm{cal}$ of heat flows through the conductor per second, the temperature difference across the conductor is

149360 A compound slab is made of two parallel plates of copper and brass of the same thickness and having thermal conductivities in the ratio 4:1. The free face of copper is at $0^{\circ} \mathrm{C}$. The temperature of the interface is $20^{\circ} \mathrm{C}$. What is the temperature of the free face of brass?