Thermal Properties of Matter questions
823 published questions with worked solutions.
- Rate of radiation by a black body is 'R' at temperature 'T'. Another body has same area but emissivity 0.2 and temperature '3T'....
- The energy spectrum of a black body exhibits a maximum around a wavelength ' '. The temperature of a black body is now changed...
- A black body radiates maximum energy at wavelength ' ' and its emissive power is 'E'. Now, due to change in temperature of that...
- Three black discs 'x', 'y', 'z' have radii 1m, 2m and 3m respectively. The wavelengths corresponding to maximum intensity are...
- A black sphere has radius 'R' whose rate of radiation is 'E' at temperature 'T'. If radius is made R3 and temperature '3T', the...
- If temperature of black body increases from 17^ C to 307^ C , then the rate of radiation increases by [MHT-CET 2023]
- About black body radiation, which one of the following is 'WRONG' statement? [MHT-CET 2023]
- Two black spheres 'P' and 'Q' have radii in the ratio 3:2. The wavelengths of maximum intensity radiation are in the ratio 3:4...
- Two spheres 'S_1' and 'S_2' have same radii but temperatures T_1 and T_2 respectively. Their emissive power is same and...
- Two spheres 'S_1' and 'S_2' have radii 'R' and '3R', temperature 'T' K and T3 K respectively. If they are coated with a material...
- A black rectangular surface of area A emits energy E per second at 27^ C . If length and breadth is reduced to ( 13 )^ rd of...
- If the radius of the star is 'r' and it acts as a black body, the temperature of the star having rate of radiation 'R' is ( =...
- Ordinary bodies A and B radiate maximum energy with wavelength difference 4 . The absolute temperature of body A is 3 times that...
- For a perfectly black body, coefficient of absorption is [MHT-CET 2022]
- Two spheres P and Q of same color having radii 8 cm and 2 cm kept at temperature 127^ C and 527^ C respectively. The ratio of the...
- Out of the following, which statement is NOT true about black body radiation? [MHT-CET 2022]
- The emissive power of sphere of area 0.04 m^2 is 0.7 k cal s^ -1 m^ -2 . The amount of heat radiated in 20 second is [MHT-CET...
- For a perfectly black body, coefficient of emission is [MHT-CET 2022]
- A perfectly black body emits a radiation at temperature 'T_1' K. If it is to radiate at 16 times this power, its temperature...
- Two stars 'P' and 'Q' emit yellow and blue light respectively. The relation between their temperatures (T_P and T_Q) is [MHT-CET...
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