General Science – Physics MCQs

Physics Objective (Multiple Choice) General Knowledge & General Science Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examinations.

21. Which of the following statements is correct?

[A] Bulk stress occurs only in liquids
[B] Longitudinal stress occurs only in solids
[C] Both a and b
[D] None of the above

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22. What is the maximum stress after which the wire breaks called as?

[A] Tensile strength
[B] Shear strength
[C] Bulk strength
[D] Hooke’s strength

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23. On which of the following factors the breaking stress depends?

[A] Area of cross-section
[B] length of the material
[C] Nature of the material
[D] None of the above

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24. What happens to a body when its density is equal to the density of the fluid?

[A] it floats
[B] it sinks
[C] it remains suspended
[D] None of the above

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25. Which of the following is equal to the upthrust of the body?

[A] mass of body
[B] weight of liquid
[C] weight of liquid displaced
[D] density of liquid

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26. Which of the following intermolecular forces enables us to write on the blackboard with a chalk?

[A] Cohesive force
[B] Adhesive force
[C] both a and b
[D] None

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27. Which of the following instruments is used to measure the relative density of a liquid?

[A] Hydrometer
[B] Hygrometer
[C] Lactometer
[D] Gravitimeter

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28. Which of these instruments is used for testing the purity of milk?

[A] Hydrometer
[B] Lactometer
[C] Galvanometer
[D] Ammeter

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29. Which of the following is correct about the density of sea water?

[A] it is more than fresh water
[B] it is less than fresh water
[C] it is equal to the density of fresh water
[D] None of the above

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30. What is the density of air at room temperature?

[A] 1.41
[B] 1.75
[C] 1.29
[D] 1.9

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