Physics MCQs: Most Important Questions for Exams

McqsTestz.com has uploaded a comprehensive collection of Physics MCQs covering a wide range of topics including mechanics, thermodynamics, electromagnetism, optics, modern physics, waves, fluids, and more. Perfect for students preparing for exams such as matriculation, intermediate, competitive tests, Lecturer and university-level assessments.

Physics MCQs

The performance of a refrigerator is described by________________?

A. efficiency

B. coefficient of performance

C. both A and B

D. not described

The unit of entropy is________________?

A. J.K

B. J/K

C. N.m/sec

D. Kgm2/sec2.K

Which quantity is a state function_______________?

A. internal energy

B. heat supply

C. pressure

D. volume

Petrol engine is a________________?

A. C.I engine

B. SI engine

C. IC engine

D. all the above

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

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

The work done in the isochoric process is________________?

A. constant

B. variable

C. zero

D. depends on situation

Adiabatic process is also called______________?

A. Heat exchange process

B. Heating process

C. Isentropic process

D. All of the above

In which process entropy remains constant________________?

A. isobaric

B. isochoric

C. adiabatic

D. isothermal

Average translational kinetic energy per molecule of an ideal gas is given by_____________?

A. 3NaT/2R

B. 2NaT/3

C. 3RT/2Na

D. 3Na/2RT

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