20000+ Important MCQs for AIR FORCE

20000+ MCQs for AIR FORCE are available here. You can learn these questions for your better preparation. Questions are available with its correct answer. You can check the correct answer of any questions by clicking the option or show answer button.
Have a nice day and enjoy learning AIR FORCE MCQ Questions.


Learn AIR FORCE MCQs with answers [Page 2990 ]

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) What is the primary fuel used in the Sun’s energy production?

  • (A) Helium → Carbon fusion
  • (B) Hydrogen → Helium fusion
  • (C) Carbon → Oxygen fusion
  • (D) Nitrogen → Oxygen fusion
Show Answer Discuss Share
Correct Answer - Option (B)

Explanation :

The Sun generates energy by fusing hydrogen nuclei into helium in its core (nuclear fusion).

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) Which layer of the Sun is considered its “surface” (the layer we see)?

  • (A) Core
  • (B) Chromosphere
  • (C) Photosphere
  • (D) Corona
Show Answer Discuss Share
Correct Answer - Option (C)

Explanation :

The photosphere is the visible ‘‘surface’’ of the Sun from which most light is emitted.

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) Approximately how old is the Sun?

  • (A) 1 billion years
  • (B) 2.5 billion years
  • (C) 4.6 billion years
  • (D) 10 billion years
Show Answer Discuss Share
Correct Answer - Option (C)

Explanation :

Scientific estimates place the Sun’s age at about 4.6 billion years.

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) Which of the following best describes the Sun’s classification?

  • (A) Red giant
  • (B) White dwarf
  • (C) G-type main sequence star
  • (D) Neutron star
Show Answer Discuss Share
Correct Answer - Option (C)

Explanation :

The Sun is a G2V, or G-type, main sequence (dwarf) star.

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) What is the approximate time taken by sunlight to reach Earth?

  • (A) 1 second
  • (B) 8 minutes 20 seconds
  • (C) 1 hour
  • (D) 24 hours
Show Answer Discuss Share
Correct Answer - Option (B)

Explanation :

Light travels the ~150 million km from the Sun to Earth in about 8 minutes and 20 seconds

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) Which part of the Sun is much hotter than its visible surface (photosphere)?

  • (A) Core
  • (B) Chromosphere
  • (C) Radiative zone
  • (D) Corona
Show Answer Discuss Share
Correct Answer - Option (D)

Explanation :

The corona (outer solar atmosphere) is much hotter (millions of K) than the photosphere (thousands of K).

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) Which fraction of the Solar System’s total mass is contained in the Sun?

  • (A) 50 %
  • (B) 75 %
  • (C) 90 %
  • (D) ~99.86 %
Show Answer Discuss Share
Correct Answer - Option (D)

Explanation :

The Sun holds about 99.86 % of the Solar System’s mass.

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) What phenomenon describes the irregular dark patches on the Sun’s photosphere that are cooler than surroundings?

  • (A) Solar flares
  • (B) Sunspots
  • (C) Prominences
  • (D) Coronal mass ejections
Show Answer Discuss Share
Correct Answer - Option (B)

Explanation :

Sunspots are cooler, magnetically active dark regions on the photosphere.

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) What causes the solar wind?

  • (A) Flow of neutral atoms from the photosphere
  • (B) Ejection of charged particles from the corona
  • (C) Reflection of light by solar flares
  • (D) Movement of sunspots
Show Answer Discuss Share
Correct Answer - Option (B)

Explanation :

The solar wind is a stream of charged particles (electrons, protons) that escape from the corona.

M

Mr. Dubey • 100.69K Points
Coach Geography

Q) What will the Sun likely become at the end of its life cycle (after exhausting hydrogen)?

  • (A) Black hole
  • (B) Neutron star
  • (C) Red giant → planetary nebula → white dwarf
  • (D) Remain as is indefinitely
Show Answer Discuss Share
Correct Answer - Option (C)

Explanation :

After hydrogen fusion ceases, the Sun will expand into a red giant, shed layers, and end as a white dwarf.

Jump to

TAGs: AIR FORCE mcqs, important AIR FORCE mcqs, important AIR FORCE questions, AIR FORCE questions, mcq for AIR FORCE, important mcq for AIR FORCE, mcqs for AIR FORCE, mcq questions for AIR FORCE, mcq question for AIR FORCE, prepare online for AIR FORCE