Thermal Properties of Matter questions
823 published questions with worked solutions.
- According to Prevost's theory every object
- Two balls A and B are made of same material, but the diameter of B is four times that of A. Both are heated to the same...
- A blackened metal foil is warmed by radiation from a point source, whose temperature is T and distance from the foil is d. It is...
- If wavelengths of max intensity of radiation emitted by sun and moon are 0.5 10^ -6 m and 10^ -4 m resp. The ratio of their temps...
- By what factor should the Kelvin temperature of an object be increased to triple the radiant energy emitted per second by the...
- A body radiates heat at the rate of 50 J/s at 250 K. When the same body is at 750 K, then its rate of radiation of heat will be
- Liquid is filled in vessel which is kept in room having temperature 20°C. When the temperature of the liquid is 80°C, it loses...
- A piece of metal and a piece of wood are kept at a temperature of 45^ on touching the two with hand: [MP PMT 1993]
- A black body with initial temperature of 300^ is allowed to cool inside an evacuated enclosure surrounded by melting ice at the...
- If the temperature of a hot body is increased by 50% the amount of radiation emitted by it increases approximately by:
- A solid copper sphere of radius R and a hollow copper sphere of equal internal and external radius R are heated to same...
- During melting process, the heat given to a body is utilised in
- Athermanous bodies are those
- Substances which transmit heat radiations are called
- The coefficient of absorption of the thermal radiation of body is
- Which of the following surfaces will radiate maximum heat?
- Perfectly black body appears black in colour because
- Which of the following is the example of ideal black body?
- The best ideal black body is
- Which of the following is NOT the property of black body radiations?
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