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A body is in thermal equilibrium with the surrounding:
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Important Questions on Heat Transfer
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Which of the following statement is correct for ideal black body:
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Two spheres, and , of the same colour and having radii and , respectively, are maintained at temperatures and , respectively. The ratio of energy radiated by and is
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On increasing the temperature of a black body, wavelength for maximum emission.
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Two spheres of radii in the ratio and densities in the ratio and of same specific heat, are heated to same temperature and left in the same surrounding. Their rate of cooling will be in the ratio
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A black body at is found to emit maximum energy at a wavelength of . If its temperature is raised to , then, the wavelength at which maximum energy is emitted is,
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The spectrum of black body radiation is a
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The temperature of a perfect black body is 727ºC and its area is 0.1 m2. If stefan's constant is 5.67 × 10–8 watt/m2-K4, then heat radiated by it in 1 minute is :
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A black body radiates energy at the rate of at a high temperature . When the temperature is reduced to , the radiant energy becomes where _____.
