Temperature of furnace is 200,^oC , in its spectrum maximum intensity is obtained at about 400,matho

English

Gujarati

Hindi

10-2.Transmission of Heat

normal

The temperature of furnace is $200\,^oC$, in its spectrum the maximum intensity is obtained at about $400\,\mathop A\limits^o $, If the maximum intensity is at $200\,\mathop A\limits^o $. Calculate the temperature of the furnace in ${}^oC$. ......... $^oC$

$400$

$673$

$946$

None of these

Solution

From work's low

$\lambda_{\mathrm{m}} \alpha \frac{1}{\mathrm{T}} \Rightarrow \frac{\lambda \mathrm{m}_{2}}{\lambda \mathrm{m}_{1}}=\frac{\mathrm{T}_{1}}{\mathrm{T}_{2}}$

$\Rightarrow \frac{200}{400}=\frac{473}{\mathrm{T}_{2}}$

$\Rightarrow \mathrm{T}_{2}=946 \mathrm{K}$ or $673^{\circ} \mathrm{C}$

Standard 11

Physics

Two diagonally opposite comers of a square made of a four thin rods of same material, same dimensions are at temperature $40^{\circ} C$ and $10^{\circ} C$. If only heat conduction takes place, then the temperature difference between other two corners will be ………. $^{\circ} C$

normal

A body cools from $62\,^oC$ to $50\,^oC$ in $10\, minutes$ and to $42\,^oC$ is next $10\, minutes$. The temp. of surrounding is …….. $^oC$

normal

A black body is heated from $7\,^oC$ to $287\,^oC$. The ratio of radiation emitted is

normal

A wall has two layer $A$ and $B$ each made of different material, both the layers have the same thickness. The thermal conductivity of the material $A$ is twice that of $B$. Under thermal equilibrium the temperature difference across the wall $B$ is $36^o C$. The temperature difference across the wall $A$ is ……. $^oC$

normal

Which of the following cylindrical rods will coduct most heat when their ends are maintained at the same steady temperatures?

normal

The temperature of furnace is $200\,^oC$, in its spectrum the maximum intensity is obtained at about $400\,\mathop A\limits^o $, If the maximum intensity is at $200\,\mathop A\limits^o $. Calculate the temperature of the furnace in ${}^oC$. ......... $^oC$

Solution

Similar Questions

Two diagonally opposite comers of a square made of a four thin rods of same material, same dimensions are at temperature $40^{\circ} C$ and $10^{\circ} C$. If only heat conduction takes place, then the temperature difference between other two corners will be ………. $^{\circ} C$

A body cools from $62\,^oC$ to $50\,^oC$ in $10\, minutes$ and to $42\,^oC$ is next $10\, minutes$. The temp. of surrounding is …….. $^oC$

A black body is heated from $7\,^oC$ to $287\,^oC$. The ratio of radiation emitted is

Which of the following cylindrical rods will coduct most heat when their ends are maintained at the same steady temperatures?

Start a Free Trial Now