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. The International Astronomical Union (IAU) considers an object to be a dwarf planet if:

  1. It orbits a star
  2. It has enough mass for its gravity to overcome external forces to acquire a near-spherical shape
  3. It doesn’t have bigger objects in its neighbourhood

Select the correct option from the codes given below:

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

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12. Which among the following is / are correct statements:
1. A sail boat can be propelled by air blown at the sail from a big fan attached to the boat
2. All type of waves exhibit diffraction
3. Potatoes, maize, barley, rice can be used for commercial production of Ethanol
Select the correct option from the codes given below:

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

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13. A person runs up two flights of stairs instead of walking up. The person feels more tired because ___?

[A] He does more work when he runs in comparison to when he walks
[B] His power output is greater when he runs in comparison to when he walks
[C] His gravitational force is greater when he runs in comparison to when he walks
[D] He has more inertia when he runs in comparison to when he walks

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14. Consider the following statements with respect to LIGO project, which is sometimes seen in news: 

  1. LIGO project helps to understand Earth’s interior by studying seismic waves.
  2. India is a partner in LIGO project.

Which of the above statements is/are correct?

[A] Only 1
[B] Only 2
[C] Both 1 & 2
[D] Neither 1 nor 2

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15. If the time taken in an echo is 5 seconds, which among the following will be the approximate distance of the object from source of sound? (assume normal room temperature at 20°C)

[A] 1715 meters
[B] 1256 meters
[C] 857 meters
[D] 554 meters

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16. Which among the following play role in the formation of Rainbow?
1. Dispersion
2. Total Internal Reflection
3. Refraction
Select the correct option from the codes given below:

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

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17. The speed of an artificial satellite depends upon:

  1. Mass of the satellite
  2. Radius of orbit for the satellite
  3. Mass of the central body about which the satellite orbits
  4. Gravitational constant

Select the correct option from codes given below:

[A] Only 2 & 3
[B] Only 2, 3 & 4
[C] Only 1, 2 & 4
[D] 1, 2, 3 & 4

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18. Consider the following physical quantities:

  1. Entropy 
  2. Work
  3. Momentum
  4. Force

Which of the above are vector quantities?

[A] 1 & 2
[B] 2 & 3
[C] 3 & 4
[D] 1 & 4

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19. In terms of Physics, which among the following situations result in work done?

  1. Brakes are applied to a moving vehicle and vehicle stops
  2. A ball is projected vertically upward and it comes back due to force of gravity
  3. A body moves in a circular path

Select the correct option from the codes given below:

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

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20. In which of the following respects, the ultra-violet radiations are similar to white light?

  1. Both obey the laws of reflection and refraction
  2. Both travel with same speed in vacuum
  3. Both are equally active chemically
  4. Both are scattered equally

Select the correct option from the codes given below:

[A] Only 1
[B] Only 1 & 2
[C] Only 1, 2 & 3
[D] 1, 2, 3 & 4

Show Answer

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