Chapter 14 – Thermometry, Expansion and KTG
Sahay Sir > Question Answers > MTG NEET Physics > Part 1 > Chapter 14 - Thermometry, Expansion and KTG
The spectral emissive power Eλ for a body at temperature T1 is plotted against the wavelength and area under the curve is found to be A. At a different temperature T2 the area found to be 9A. Then λ2 /λ1 is :
11
Sep
The spectral emissive power Eλ for a body at temperature T1 is plotted against the wavelength and area under the curve is found to be A. At a different temperature T2 the area found to be 9A. Then λ2 /λ1 is : A difference of temperature of 25^∘C is equivalent to a difference of. September [...]
Two spherical bodies A (radius 6 cm) and B (radius 18 cm) are at temperature T1 and T2, respectively. The maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering them to be black bodies, what will be the ratio of the rate of total energy radiated by A to that of B?
11
Sep
Two spherical bodies A (radius 6 cm) and B (radius 18 cm) are at temperature T1 and T2, respectively. The maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering them to be black bodies, what will be the ratio of the [...]
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respectively. The maximum intensity in the emission spectrum of A is at 500 nm and in that of B is at 1500 nm. Considering them to be black bodies ,
Two spherical bodies A (radius 6 cm) and B (radius 18 cm) are at temperature T1 and T2 ,
what will be the ratio of the rate of total energy radiated by A to that of B? ,
If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously will be
11
Sep
If the temperature of the sun were to increase from T to 2T and its radius from R to 2R, then the ratio of the radiant energy received on earth to what it was previously will be If the temperature of the sun were to increase from T to 2T and its radius from R [...]
Assuming the sun to be a spherical body of radius R at a temperature of TK, evaluate the total radiant power, incident on earth, at a distance r from the sun.
11
Sep
Assuming the sun to be a spherical body of radius R at a temperature of TK, evaluate the total radiant power, incident on earth, at a distance r from the sun. Assuming the sun to be a spherical body of radius R at a temperature of TK at a distance r from the sun. evaluate [...]
The radiation emitted by a star A is 10,000 times that of the sun. If the surface temperatures of the sun and the star A are 6000 K and 2000 K respectively, the ratio of the radii of the star A and the sun is
11
Sep
The radiation emitted by a star A is 10,000 times that of the sun. If the surface temperatures of the sun and the star A are 6000 K and 2000 K respectively, the ratio of the radii of the star A and the sun is 000 times that of the sun. If the surface temperatures [...]
When the temperature of black body increases, it is observed that the wavelength corresponding to maximum energy changes from 0.26 μm to 0.15 μm. The ratio of the emissive powers of the body at the respective temperatures is:
11
Sep
When the temperature of black body increases, it is observed that the wavelength corresponding to maximum energy changes from 0.26 μm to 0.15 μm. The ratio of the emissive powers of the body at the respective temperatures is: it is observed that the wavelength corresponding to maximum energy changes from 0.26 μm to 0.15 μm. [...]
A black body at 200 K is found to exit maximum energy at a wavelength 14 μm. When its temperature is raised to 1000 K, then wavelength at which maximum energy emitted is
11
Sep
A black body at 200 K is found to exit maximum energy at a wavelength 14 μm. When its temperature is raised to 1000 K, then wavelength at which maximum energy emitted is A black body at 200 K is found to exit maximum energy at a wavelength 14 μm. When its temperature is raised [...]
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?
11
Sep
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? The coefficient of thermal conductivity of copper is 9 times that of steel. In the composite cylindrical bar shown in the [...]
Two rods of same length and materials transfer a given amount of heat in 12 sec . When they are jointed end to end, but when they are jointed lengthwise they will transfer same heat in same condition will be
11
Sep
Two rods of same length and materials transfer a given amount of heat in 12 sec . When they are jointed end to end, but when they are jointed lengthwise they will transfer same heat in same condition will be but when they are jointed lengthwise they will transfer same heat in same condition will [...]
The coefficient of thermal conductivity of copper, mercury and glass are respectively Kc , Km and Kg such that Kc > Km > Kg . If the same quantity of heat is to flow per sec per unit area of each and corresponding temperature gradients are Xc , Xm and Xg representative then
11
Sep
The coefficient of thermal conductivity of copper, mercury and glass are respectively Kc , Km and Kg such that Kc > Km > Kg . If the same quantity of heat is to flow per sec per unit area of each and corresponding temperature gradients are Xc , Xm and Xg [...]