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qUESTIONS

The temperature of a black body is increased by 50%, then the percentage increase in the radiant energy is nearly

The surface area of a black body is 5×10^-4 m^2 and its temperature is 727°C. the energy radiated by it per minute is (σ=5.67×10^-8 Jm^-2 S^-1 K^-4)

A black body at a high temperature radiates energy at the rate of U (in Wm-²). When the temperature falls to half, the radiated energy (in Wm-²) will be

Two moles of oxygen is mixed with eight moles of helium. The effective specific heat of the mixture at constant volume is

The maximum wavelength of radiation at 2000 K is 4 µm. What will be the maximum wavelength emitted at 2400 K

The change in volume V with respect to an increase in pressure P has been shown in the figure for a non-ideal gas at four different temperatures T1, T2, T3 and T4. The critical temperature of the gas is

The graph which represents the variation of mean kinetic energy of molecules with temperature t°C is

The pressure is exerted by the gas on the walls of the container because

Gas at a pressure Po is contained in a vessel. If the masses of all the molecules are halved and their speeds are doubled, the resulting pressure P will be equal to

For a gas if Ɣ= 1.4, then atomicity, Cp and Cv of the gas are respectively

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