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.

11. On changing the medium, the ray of light bends. Which of the following is / are responsible for this change?

  1. Change in speed of light
  2. Change in frequency of light
  3. Change in wavelength of light

Select the correct option from the codes given below:

[A] Only 1 is correct
[B] Only 1 & 2 are correct
[C] Only 1 & 3 are correct
[D] 1, 2 & 3 are correct

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12. Which of the following is/are part of the Classical Physics?

[A] Optics
[B] Thermodynamics
[C] Both a and b
[D] None

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13. Which of the following is correct about the properties of Gravitational Forces?

[A] They are the strongest forces in nature
[B] They observe inverse square law
[C] Both a and b
[D] None

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14. Which of the following is NOT correct about an inelastic collision?

[A] Linear momentum is conserved
[B] Kinetic energy is conserved
[C] Total energy is conserved
[D] Some or all the forces involved may be non-conservative in nature

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15. Which of the following is incorrect:

[A] Gravitational force of attraction is independent of nature of intervening medium
[B] Gravitational forces are central forces
[C] Gravitational forces are non-conservative forces
[D] All of the above

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16. What is the gravitational potential energy for infinite distance?

[A] 0
[B] infinity
[C] 9.8 J
[D] None of the above

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17. Which of the following is correct about the value of acceleration due to gravity?

[A] it is greater at mountains than in plains
[B] it is lesser at mountains than in plains
[C] it is equal for mountains and plains
[D] None of the above

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18. In which of the following situations, the state of weightlessness can be observed?

[A] When objects fall freely under gravity
[B] When a satellite revolves in its orbit around the earth
[C] When bodies are at null points in outer space
[D] All of the above

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19. On which of the following the gravitational force between two objects does not depend?

[A] Gravitational constant
[B] Distance between the objects
[C] Product of the masses of the objects
[D] Sum of the masses of the objects

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20. Which of the following has an effect on the value of acceleration due to gravity?

[A] Shape of the earth
[B] Height above the earth surface
[C] Axial rotation of the earth
[D] All of the above

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