Thermal Properties of Matter questions
823 published questions with worked solutions.
- The law which relates the energy radiated per second by unit area of a body and fourth power of absolute temperature of body is
- One black body at temperature T is surrounded by another black body at temperate T_1 (T_1 < T). At T, the radiation emitted by...
- The amount of radiation emitted by a perfectly black body is proportional to
- The unit of Stefan's constant in S.I. system will be
- Newton's law of cooling refers to
- Graph of rate of cooling against time is (assume Newton's law of cooling)
- Two thermometers A and B are exposed to sunlight. The valve of A is painted black but that of B is not painted. The correct...
- According to Newton's law of cooling, the rate of cooling of a body is proportional to ( )^n, where is the difference of the...
- Newton's law of cooling is also applicable to
- Newton's law of cooling is applicable for
- Greenhouse effect is the consequence of
- Emissive power of a perfectly black body
- Out of 10 J of radiant energy incident on a surface, the energy absorbed by the surface is 2 J and the energy reflected is 7 J....
- The coefficient of absorption and reflection of the surface of a body are 0.75 and 0.20 respectively. If 200 calorie of radiant...
- If an athermanous body absorbs 20% of the incident radiant energy, then reflection coefficient of the body is
- An ideal black-body at room temperature is thrown into a furnace. It is observed that
- A body of surface are 1.5 10^ -3 m^2 emits 0.3 kcal in 40 second at a temperature 70°C. The emissive power of the surface at that...
- The rate of emission of heat energy per unit area of an iron ball of radius 10 cm is 10 J/m^2 ,s , then rate of emission of heat...
- Emissive power of cube is 1000 J/m^2 ,s and it radiates heat at the rate 60 watt at that temperature. The length of each side of...
- A hot and a cold body are kept in vacuum separated from each other. Which of the following causes decrease in temperature of the...
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