Physics questions
20027 published questions with worked solutions.
- Given that 'p' joule of heat is incident on a body and out of it 'q' joule is the total amount of heat reflected and transmitted...
- If gas is compressed isothermally then the r. m. s. velocity of the molecules [MHT-CET 2021]
- The ratio of rate of loss of heat from a metal sphere at 627^ C with rate of loss of heat from the same sphere at 227^ C will be...
- Equal volumes of two gases are kept in different containers having densities in the ratio 1:16. They exert equal pressures on the...
- A molecule of mass 'm' moving with velocity 'v' makes 5 elastic collisions with a wall of container per second. The change in...
- If 'E' is the kinetic energy per mole of an ideal gas and 'T' is the absolute temperature, then universal gas constant is given...
- The translational kinetic energy of the molecules of a gas at absolute temperature (T) can be doubled [MHT-CET 2021]
- For a gas molecule with 6 degrees of freedom, which one of the following relation between gas constant 'R' and molar specific...
- If the temperature of the sun is doubled, the rate of energy received by the earth will be increased by a factor [MHT-CET 2021]
- 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...
- The change in internal energy of the mass of a gas, when the volume changes from 'V' to '2V' at constant pressure 'P' is ( =...
- An ideal gas having molar mass 'M_0', has r. m. s. velocity 'V' at temperature 'T'. Then [MHT-CET 2021]
- For a perfectly black body, coefficient of emission is [MHT-CET 2021]
- The temperature of a black body is increased by 50%, then the percentage increase in the rate of radiation by the body is...
- For an ideal gas, R= 23C_v. This suggests that the gas consists of molecules, which are [R = universal gas constant] [MHT-CET...
- The rms speed of a gas molecule is 'V' at pressure 'P'. If the pressure is increased by two times, then the rms speed of the gas...
- Equal volumes of two gases, having their densities in the ratio of 1:16 exert equal pressures on the walls of two containers. The...
- Which one of the following is NOT a correct expression for an ideal gas? [C_p = Molar specific heat of a gas at constant...
- The molecular masses of helium and oxygen are 4 and 32 respectively. The ratio of r. m. s. speed of helium at 327°C to r. m. s....
- Assume that for solar radiation, surface temperature of the sun is 6000 K. If Wien's constant 'b' is 2.897 10^ -3 mK, the value...