Academictask provides MCQs of Physics from Basic to Advance, so that you can prepare accordingly. Physics Mcqs section is useful for both students and job seekers i.e MCAT ECAT ETEA test preparation, PPSC Test, FPSC Test, SPSC Test, KPPSC Test, BPSC Test, other competitive and entry test preparations. Here you will find physics MCQs and answers with detailed explanations. MCQs of Physics include basic physics MCQs, Measurements MCQs, Vectors And Equilibrium MCQs, Work and Energy MCQs, Motion and Force MCQs, Circular Motion MCQs, Fluid Dynamics MCQs, Waves MCQs, Heat and Thermodynamics MCQs, Current Electricity MCQs, Electrostatics MCQs, Electromagnetism MCQs, Electromagnetic Induction MCQs, Alternating Current MCQs, Nuclear Physics MCQs, etc.

231. In which process entropy remains constant________________?
A. isobaric
B. isochoric
C. adiabatic
D. isothermal

232. Adiabatic process is also called______________?
A. Heat exchange process
B. Heating process
C. Isentropic process
D. All of the above

233. The work done in the isochoric process is________________?
A. constant
B. variable
C. zero
D. depends on situation

234. For the successful operation of Heat engine which condition should be met ?
A. cyclic process
B. operated at certain temperature difference
C. both A and B
D. none of these

235. The purpose of flywheel in the engines is________________?
A. to smooth out the energy variation
B. to add more weight to engine to work it stable
C. to start engine
D. both A and B

236. Petrol engine is a________________?
A. C.I engine
B. SI engine
C. IC engine
D. all the above

237. Which quantity is a state function_______________?
A. internal energy
B. heat supply
C. pressure
D. volume

238. The unit of entropy is________________?
A. J.K
B. J/K
C. N.m/sec
D. Kgm2/sec2.K

239. The performance of a refrigerator is described by________________?
A. efficiency
B. coefficient of performance
C. both A and B
D. not described

240. In which process all the heat supplied is converted into work done ?
A. isothermal
B. isochoric
C. isobaric
D. isentropic