physics MCQs – Page 18

Practise multiple-choice questions from physics for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

physics Mcqs
851. If we look at the floating piece of iceberg on the sea, approximately what fraction of it is visible above the seawater level?
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A. 1/8th

B. None of these

C. 1/10th

D. 1/6th

852. The alternating voltage is an example of_______________?
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A. Discrete waveform

B. A digital waveform

C. An analogue waveform

D. None at all

853. Name the SI unit having the symbol cd?
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A. Candela

B. Ampere

C. Second

D. Cm

854. The area enclosed by the curve ABCDA for a Carnot heat engine represents the work done by Carnot engine_______________?
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A. averagely

B. at any instant

C. during its operation

D. during one cycle
855. In bringing an electron towards the second electron, the electrostatic potential energy of the system
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A. Decreases

B. increases

C. remains the same

D. becomes zero

856. Which one of following band is completely filled in case of conductors ?
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A. Valence band

B. Forbidden band

C. Fermi band

D. Conduction band
857. The velocity of laser light is___________________?
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A. More than ordinary light

B. Less than ordinary light

C. Equal to ordinary light

D. Different for different colours or frequency