Physics questions
20027 published questions with worked solutions.
- 1 mm^3 of a gas is compressed at 1 atmospheric pressure and temperature 27 ,^ C to 627 ,^ C . What is the final pressure under...
- A scientist says that the efficiency of his heat engine which operates at source temperature 127 ,^ C and sink temperature 27 ,^...
- If the door of a refrigerator is kept open, then which of the following is true? [JIPMER 2002, AIEEE 2002, CPMT 2003]
- A cylinder fitted with a piston contains 0.2 moles of air at temperature 27 ,^ C . The piston is pushed so slowly that the air...
- The efficiency of a Carnot engine which operates between the two temperatures T_1 = 500 K and T_2 = 300 K is
- When an ideal monoatomic gas is heated at constant pressure, fraction of heat energy supplied which increases the internal energy...
- If the amount of heat given to a system is 35 J and the amount of work done on the system is 15 J, then the change in internal...
- 5.6 litre of helium gas at S.T.P. is adiabatically compressed to 0.7 litre. Taking the initial temperature to be T_1, the work...
- When an ideal gas in a cylinder was compressed isothermally by a piston, the work done on the gas was found to be 1.5 10^4...
- U + W = 0 is valid for [RPMT 2000]
- During the adiabatic expansion of 2 moles of a gas, the internal energy of the gas is found to decrease by 2 joules, the work...
- The amount of heat given to a system in a cyclic thermodynamical process [RPET 1992, RPMT 1988]
- One mole of an ideal gas at an initial temperature of T K does 6R joules of work adiabatically. If the ratio of specific heats of...
- For adiabatic process ( = C_p C_v ) [K CET 1999, MP PET 1995, CPMT 2003]
- 110 J of heat is added to a gaseous system, whose internal energy change is 40 J, then the amount of external work done is
- The pressure P, volume V and temperature T for a certain gas are related by P = AT - BT^2 V , where A and B are constants. The...
- During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its temperature. The ratio of C_p...
- Absorption coefficient of totally blackbody is [RPET 1995, Manipal 2003, Manipal 2000]
- When 150 J of energy is incident on surface of a body, 15 J of energy is reflected by it. If the coefficient of absorption is...
- Coefficient of transmission is 0.22 and coefficient of reflection is 0.74 for a given body. For a given body, at given...