Physics questions
20027 published questions with worked solutions.
- Average kinetic energy of H_2 molecule at 300K is 'E'. At the same temperature, average kinetic energy of O_2 molecule will be...
- About black body radiation, which one of the following is 'WRONG' statement? [MHT-CET 2023]
- Two black spheres 'P' and 'Q' have radii in the ratio 3:2. The wavelengths of maximum intensity radiation are in the ratio 3:4...
- Two spheres 'S_1' and 'S_2' have same radii but temperatures T_1 and T_2 respectively. Their emissive power is same and...
- Two spheres 'S_1' and 'S_2' have radii 'R' and '3R', temperature 'T' K and T3 K respectively. If they are coated with a material...
- One mole of a diatomic gas does a work Q3, when the amount of heat supplied is 'Q'. In this process, the molar heat capacity of...
- The value of ' ' for a gas is given as =1+ 2f, where 'f' is the number of degrees of freedom of a molecule of a gas. What is the...
- At what temperature is the R.M.S. Velocity of Hydrogen molecule equal to that of an oxygen molecule at 47^ ? (Molecular weight of...
- The ratio of the specific heats C_p C_v = in terms of degrees of freedom 'n' is given by [MHT-CET 2022]
- A black rectangular surface of area A emits energy E per second at 27^ C . If length and breadth is reduced to ( 13 )^ rd of...
- Let the r. m. s. velocity of molecule of a given mass of gas be C_1 at temperature 27^ C . When the temperature is increased to...
- Heat is applied to a rigid diatomic gas at constant pressure. The ratio Q: U: W is [MHT-CET 2022]
- Let ' ' and 'b' be Stefan's constant and Wien's constant respectively, then dimensions of b are [MHT-CET 2022]
- For a gas R C_v =0.67. This gas is made up of molecule which are [MHT-CET 2022]
- If 'f' is the number of degrees of freedom of a molecule of a gas and ratio of molar specific heat of a gas, =1+ 2f where = C_p...
- If the radius of the star is 'r' and it acts as a black body, the temperature of the star having rate of radiation 'R' is ( =...
- Heat is supplied to a diatomic gas at constant pressure. The ratio of Q: U: W is [ Q= amount of heat supplied, U= Increase in the...
- Ordinary bodies A and B radiate maximum energy with wavelength difference 4 . The absolute temperature of body A is 3 times that...
- The molar specific heat at constant pressure of an ideal gas is ( 72 )R. The ratio of specific heat at constant pressure to that...
- For a perfectly black body, coefficient of absorption is [MHT-CET 2022]