Thermal Properties of Matter questions
823 published questions with worked solutions.
- In which mode of transmission, the heat waves travel along straight line with the speed of light?
- A black body at a high temperature T radiates energy at the rate of U (in W ,m^ -2 ). When the temperature falls to half (i.e. T...
- An ideal black body at room temperature is thrown into a furnace. It is observed that,
- On observing light from three different stars P, Q and R, it was found that intensity of violet colour is maximum in the spectrum...
- A spherical black body with a radius of 12 cm radiates 450 W power at 500 K . If the radius were halved and the temperature...
- The power radiated by a black body is P and it radiates maximum energy at wavelength _0. If the temperature of the black body is...
- Two spherical black bodies of radius r_1 and r_2 with surface temperature T_1 and T_2 respectively, radiate same power, then r_1...
- Heat energy is incident on the surface at the rate of 1000 J/min . If coefficient of absorption is 0.8 and coefficient of...
- A black rectangular surface of area A emits energy E per second at 27^ C . If length and breadth are reduced to ( 1 3 )rd of...
- A black body radiates heat at temperatures T_1 and T_2 (T_2 > T_1). The frequency corresponding to maximum energy is [MHTCET 2015]
- A piece of iron is heated in a flame. If first becomes dull red, then becomes reddish yellow and finally turns to white hot. The...
- A black body at a temperature of 227^ C radiates heat energy at the rate 5 cal/cm^2 - s . At a temperature of 727^ C , the rate...
- The sphere of radii 8 cm and 2 cm are cooling. Their temperatures are 127^ C and 527^ C , respectively. Find the ratio of energy...
- If 150 J of energy is incident on area 2 m^2 . If Q_r = 15 J , coefficient of absorption is 0.6, then amount of energy...
- A black body is heated from 27^ C to 927^ C . The ratio of radiation emitted will be [MHTCET 2019]
- A black body is at a temperature 300 K . It emits energy at a rate proportional to [MHTCET 2012]
- The temperature of the two bodies A and B are respectively 727^ C and 327^ C . The ratio E_A : E_B of is [MHTCET 2022]
- The maximum wavelength of radiation emitted by a star is 289.8 nm . Then intensity of radiation for the star is (Given: Stefan's...
- The S. I. unit and dimensions of Stefan's constant ' ' in case of Stefan's law of radiation is [MHT-CET 2023]
- The original temperature of a black body is 727^ C . The temperature to which the black body must be raised so as to double the...
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