Thermal Properties of Matter questions
823 published questions with worked solutions.
- Consider a compound slab consisting of two different materials having equal thicknesses and thermal conductivities K and 2K,...
- If _m denotes the wavelength at which the radioactive emission from a black body at a temperature T K is maximum, then :-
- A black body at 1227^ C emits radiations with maximum intensity at a wavelength of 5000 . The temperature of the body is...
- Assuming the sun to have a spherical outer surface of radius r, radiating like a black body at temperature t^ C , the power...
- A black body is at 727^ C . It emits energy at a rate which is proportional to
- On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are 39^ W and...
- The two ends of a rod of length L and a uniform cross-sectional area A are kept at two temperatures T_1 and T_2 (T_1 > T_2). The...
- A black body at 227^ C radiates heat at the rate of 7 cals/cm ^2 s . At a temperature of 727^ C , the rate of heat radiated in...
- A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t....
- A thermocouple of negligible resistance produces an e.m.f. of 40 V /^ C in the linear range of temperature. A galvanometer of...
- Steam at 100^ C is passed into 20 g of water at 10^ C . When water acquires a temperature of 80^ C , the mass of water present...
- Certain quantity of water cools from 70^ C to 60^ C in the first 5 minutes and to 54^ C in the next 5 minutes. The temperature of...
- On observing light from three different stars P, Q and R, it was found that intensity of violet color is maximum in the spectrum...
- The two ends of a metal rod are maintained at temperatures 100^ C and 110^ C . The rate of heat flow in the rod is found to be...
- A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is U_1, at...
- Coefficient of linear expansion of brass and steel rods are _1 and _2. Lengths of brass and steel rods are l_1 and l_2...
- A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice...
- A spherical black body with a radius of 12 cm radiates 450 watt 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...
- A copper rod of 88 cm and an aluminium rod of unknown length have their increase in length independent of increase in...
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