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

Which one of the following has the greatest energy gap ?

A. insulator

B. conductor

C. semi conductor

D. any of above

The velocity of an oscillating charge as it moves to and fro along a wire is always_____________?

A. constant

B. zero

C. changing

D. infinite

Identify the correct statement about minority carriers_____________?

A. holes in n-type and free electrons in p-type

B. holes in n-type and p-type

C. free electrons in n-type and holes in p-type

D. free electrons in n-type and p-type

In n-p-n transistor, p works as______________?

A. collector

B. emitter

C. base

D. any of above

p-n junction when reversed biased acts as a_______________?

A. capacitor

B. inductor

C. on switch

D. off switch

Semi-conductor germanium and silicon are_________________?

A. pentavalent

B. trivalent

C. divalent

D. tetravalent

Electrons present in p-type material due to thermal pair generation are_____________?

A. majority carriers

B. minority carriers

C. dual carriers

D. blockers

The velocity of laser light is___________________?

A. Less than ordinary light

B. More than ordinary light

C. Equal to ordinary light

D. Different for different colours or frequency

Reflecting mirrors in laser is used to______________?

A. Further stimulation

B. Lasing more

C. For producing more energetic lasers

D. All

In He-Ne laser the lasing action is produced by_______________?

A. Ne only

B. He-Ne both

C. Electrons of He

D. Electrons Ne

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