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 Fahrenheit and centigrade scales agree to________________?

A. 40

B. 15.5

C. 542

D. 273

Normal human body temperature 98.6°F corresponds to______________?

A. 37°C

B. 42°C

C. 55°C

D. 410°C

Numerical value of Boltzmanns constant is______________?

A. 1.38×10-31JK-1

B. 3.18×10-31JK-1

C. 3.18×10-23JK-1

D. 1.38×10-23JK-1

We prefer mercury as a thermometric substance because______________?

A. Over a wide range of temperature its expansion is uniform

B. It does not stick to thermometer glass

C. It opaque to light

D. All of above

In a clinical thermometer the mercury in the capillary tube does not contract once removed from the patient because_______________?

A. Mercury takes a long time to contract

B. The amount of mercury use is very small

C. The capillary tube has a small constriction near the bulb

D. The capillary tube is very narrow

Which one is not an example of adiabatic process ?

A. rapid escape of air from a burst tyre

B. rapid expansion of air

C. conversion of water into ice in refrigerator

D. cloud formation in the atmosphere

If the volume of a gas is held constant and we increase its temperature then_______________?

A. its pressure is constant

B. its pressure rises

C. its pressure falls

D. any of above

Boyles law holds for ideal gases in________________?

A. isochoric processes

B. isobaric processes

C. isothermal processes

D. adiabatic processes

Gas molecules of different masses in the same container have the same average transnational kinetic energy which is directly proportional to their_____________?

A. volume

B. pressure

C. absolute temperature

D. time

If the pressure of a given gas is held constant its density is inversely proportional to its absolute temperature. We can refer it as another statement of______________?

A. Boyles law

B. Charles law

C. Ideal gas law

D. Avogadro’s law

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