Thermal Properties of Matter questions
823 published questions with worked solutions.
- The coefficients of absorption and transmission of the body are 0.50 and 0.25 respectively. If 200 calories, of radiant heat is...
- Black body is defined as the body
- Which of the following body emits more heat
- Perfectly black body appears black in colour because
- Emissivity of perfectly black body is
- A metal ball has black spots which is high heated and then kept in dark room. After this.
- When a perfect black body is heated, it emits thermal radiation of
- The best ideal black body is
- Which of the following will radiate heat to a large extent?
- If the temperature of a perfectly black body increases two times then the rate of radiation of the body also increases by
- The amount of heat energy radiated per second by a surface depends upon
- A body, which emits radiations of all possible wavelengths, is known as
- Which of the following is the example of ideal black body
- Reflectivity of a perfectly black body is
- Three bodies A, B and C have equal area which are painted red, yellow and black respectively If they are at same temperature then
- A body of surface area 5 cm² and temperature 727° C, emits 300 Joules of energy per minute Its emissivity will be
- The temperature of a tungsten bulb is 3000 K. the area of its surface is 0.25 cm² and emissivity is 0.35, then the power of bulb...
- A body of surface area 15 10^ -3 m² emits 0.3 kcal in 40 second at a temperature 70°C, the emissive power of the surface at that...
- Emissive power of cube is 1000 J/m²s and it radiates heat at the rate 60 watt at that temperature. The length of each side of...
- The emissive power of a sphere of area 0.07 m² is 0.5 k cal/ m²s. The amount of heat radiated by the spherical surface, in 20...
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