Part 1
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 [...]
Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The point A and B are maintained at different temperature. The ratio of the heat transferred through a cross-section of a semi-circular rod to the heat transferred through a cross section of the straight rod in a given time
11
Sep
Two rods (one semi-circular and other straight) of same material and of same cross-sectional area are joined as shown in the figure. The point A and B are maintained at different temperature. The ratio of the heat transferred through a cross-section of a semi-circular rod to the heat transferred through a cross section of the [...]
2 kg of Ice at – 20° C is mixed with 5 kg of water at 20°C in an insulating vessel having a negligible heat capacity calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice care 1 Kcal/kg per °C and 0.5 Kcal/kg 1°C while the latent heat of fusion of ice is 80 Kcal/kg.
11
Sep
2 kg of Ice at – 20° C is mixed with 5 kg of water at 20°C in an insulating vessel having a negligible heat capacity calculate the final mass of water remaining in the container. It is given that the specific heats of water and ice care 1 Kcal/kg per °C and 0.5 Kcal/kg [...]
Work done in converting 1g of ice at – 10C into steam at 100C is.
11
Sep
Work done in converting 1g of ice at – 10C into steam at 100C is. Work done in converting 1g of ice at - 10C into steam at 100C is. September 11, 2021 Category: Chapter 14 - Thermometry, Expansion and KTG , MTG NEET Physics ,
A solid substance is at 30^∘C. To this substance heat energy is supplied at a constant rate. Then temperature versus time graph is as shown in the figure. The substance is in liquid state for the portion (of the graph)
11
Sep
A solid substance is at 30^∘C. To this substance heat energy is supplied at a constant rate. Then temperature versus time graph is as shown in the figure. The substance is in liquid state for the portion (of the graph) A difference of temperature of 25^∘C is equivalent to a difference of. September 11, 2021 [...]
1 gram of ice is passed into a container having 2 grams of water at 35 C. The equilibrium temperature of the mixture is
11
Sep
1 gram of ice is passed into a container having 2 grams of water at 35 C. The equilibrium temperature of the mixture is 1 gram of ice is passed into a container having 2 grams of water at 35 C. The equilibrium temperature of the mixture is September 11, 2021 Category: Chapter 14 - [...]
Specific heat of aluminium metal 24.4 j/mole K. Express the specific heat in j/kg K.
11
Sep
Specific heat of aluminium metal 24.4 j/mole K. Express the specific heat in j/kg K. Specific heat of aluminium metal 24.4 j/mole K. Express the specific heat in j/kg K. September 11, 2021 Category: Chapter 14 - Thermometry, Expansion and KTG , MTG NEET Physics ,