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

Unit of power of a lens is________________?

A. meter

B. watt

C. diopter

D. horsepower

The diameter of a lens is called________________?

A. focal length

B. principal axis

C. aperture

D. radius of curvature

A lens which converges a beam of parallel rays to a point is called______________?

A. diverging (or concave) lens

B. converging (or convex) lens

C. plano concave lens

D. plano convex lens

Electron moves in the orbit as________________?

A. Simple vibratory motion

B. Standing wave motion

C. Vibratory motion like up and down

D. S.H.M likes the sound

Compton effect proves the________________?

A. Photon theory of light

B. Dual nature of light

C. Wave nature of light

D. Uncertain nature of light

The energy radiated is directly proportional to the fourth power of Kelvins temperature is________________?

A. Karl-Weins law

B. Rayleigh-Jeans law

C. Stephens law

D. Plancks

For confinement of electron in a box of radius 10-14m the electron, speed should be_____________?

A. 107m/sec

B. Should be greater than the speed of light.

C. Be zero

D. Not be wave-like

The uncertainty in momentum & position is due to its_____________?

A. Property of matter and radiation

B. Two-dimensional motion

C. Emission of the certain wavelength

D. Very high velocity

A three-dimensional image is obtained by________________?

A. Electron microscope

B. Scanning electron microscope

C. Magnetic imaging

D. None of the above

In the electron microscope, electric & magnetic fields are used as_______________?

A. Electromagnetic gun

B. Source of electromagnetic waves

C. Deflecting charged particle

D. Converging source of electrons

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