Physics questions
20027 published questions with worked solutions.
- A monoatomic gas is kept at room temperature 300 K. Calculate the average kinetic energy of gas molecule (Use K = 1.38 10^ -23...
- Average kinetic energy of molecules is [MH-CET 2004]
- The kinetic energy of one g-mole of a gas at normal temperature and pressure is (R = 8.31 J/mole-K) [AFMC 1998, MH-CET 1999]
- In a gas 5 molecules have speed 150 m/s, 160 m/s, 170 m/s, 180 m/s, 190 m/s. Ratio of v_ r.m.s. to v_ mean is nearly
- The temperature of a gas at pressure P and volume V is 27 ,^ C . Keeping its volume constant, if its temperature is raised to 927...
- One kg of a diatomic gas is at a pressure of 8 10^4 N/m^2 . The density of the gas is 4 kg/m^3 . What is the energy of the gas...
- Mean kinetic energy (or average energy) per gm molecule of a monoatomic gas is given by
- At constant volume, the specific heat of a gas is 3R 2 , then the value of will be
- For a gas if = 1.4, then atomicity, C_P and C_V of the gas are respectively [MP PET 1997]
- The molar specific heat at constant pressure of an ideal gas is ( 7 2 )R. The ratio of specific heat at constant pressure to that...
- For a gas if ratio of specific heats at constant pressure and volume is then value of degrees of freedom is [CBSE PMT 2000, AFMC...
- A gas expands 0.25 m^3 at constant pressure 10^3 N/m^2 , the work done is
- If = 2.5 and volume is equal to 1 8 times to the initial volume then pressure P' is equal to (Initial pressure = P) [RPET 2003,...
- The gas law PV T = constant is true for [MNR 1974, MP PMT 1984, BHU 1995, BHU 1998, BHU 2000]
- Air in a cylinder is suddenly compressed by a piston, which is then maintained at the same position. With the passage of time [D...
- An adiabatic process occurs at constant [AIIMS 1999, UPSEAT 1999, Pb. PET 2000, Pb. PET 2004]
- 5 moles of oxygen is heated at constant volume from 10 ,^ C to 20 ,^ C . The change in the internal energy of the gas is (the...
- The internal energy change in a system that has absorbed 2 kcal of heat and done 500 J of work is
- A Carnot engine takes 3 10^6 cal of heat from a reservoir at 627 ,^ C and gives it to a sink at 27 ,^ C . The work done by the...
- When heat energy of 1500 joules is supplied to a gas at constant pressure 2.1 10^5 N/m^2 , there is an increase in its volume...