Thermal Properties of Matter questions
823 published questions with worked solutions.
- 100 g of water is heated from 30℃ to 50℃ ignoring the slight expansion of the water, the change in its internal energy is...
- A black pattern on a porcelain bowl appears brighter than the rest of bowl, when it is strongly heated and taken to a dark room....
- Two bodies A and B having same surfaces areas have emmissivities of 0.01 and 0.49 respectively. The two bodies emit total radiant...
- An ideal black-body is at room temperature. If it is thrown into a furnace, it will be observed that
- Solar radiation emitted by sun resembles that emitted by a black body at a temperature of 6000 K. Maximum intensity is emitted at...
- The energy emitted per second by a black body at 27^ is 10 J. If the temperature of black body is increased to 327^ , the energy...
- A surface at temperature T_0 kelvin receives power P by radiation from a small sphere at temperature T > T_0 and at a distance d....
- Consider a black body radiation in a cubical box at absolute temperature T. If the length of each side of the box is doubled and...
- The total radiant energy per unit area normal to the direction of incidence, received at a distance R from the centre of a star...
- At 273^ , the emissive power of a perfect black body is R. What is its value at 0^ ?
- A black body at 227^ radiates heat at the rate of 7 cal ,cm^ -2 ,s^ -1 . At a temperature of 727^ , the rate of heat radiated (in...
- The rate of emission of a black body at 0^ is R, its rate of emission at 273^ is
- The rectangular surface of area 8 cm 4 cm of black body at a temperature of 127^ emits energy at the rate of E per second. If the...
- The temperature of a black body is increased by 50%, then the percentage of increase of radiation is approximately
- A planet is at an average distance d from the sun and its average surface temperature is T. Assume that the planet receives...
- The wavelength of maximum intensity of radiation emitted by a star is 289.8 nm and the radiation intensity of the star is (Take,...
- If temperature of black body increases from 300 K to 900 K , then the rate of energy radiation increases by
- The radiation emitted by a star A is 10000 times that of the sun. If surface temperatures of sun and star A are 6000 K and 2000 K...
- Three objects colored black, grey and white can withstand hostile conditions at 2800^ C . These objects are thrown into furnace,...
- A black body radiates at two temperatures T_1 and T_2 such that T_1 < T_2. The frequency corresponding to maximum energy is
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