UPSC CAPF AC 2025 Paper 1 · Question 121

Question 121 of the UPSC CAPF (AC) 2025 Paper I (3 August 2025). Try it first, then open the answer and explanation.

1. CAPF 2025 · P-I · Q121 · Geography · Physical Geography

   The seasonal variations in the amount of solar energy that any place on the Earth receives are influenced by

   1. the speed of rotation of the Earth
   2. pollution
   3. cloudiness
   4. the inclination of the Earth about its axis

   पृथ्वी पर किसी भी स्थान को प्राप्त होने वाली सौर ऊर्जा की मात्रा में होने वाले मौसमी परिवर्तन किससे प्रभावित होते हैं?

   1. पृथ्वी के घूर्णन की गति
   2. प्रदूषण
   3. बादल छाए रहना
   4. पृथ्वी की अपनी धुरी पर झुकाव
   Show answer

   Answer: (4) the inclination of the Earth about its axis

   उत्तर: (4) पृथ्वी की अपनी धुरी पर झुकाव

   The Earth's axis is tilted about 23.5° from the perpendicular to its orbital plane, so as the Earth revolves the angle of the Sun's rays and the length of day at a place change through the year, causing seasonal variation in insolation. Rotation causes day and night, while cloudiness and pollution reduce insolation locally but do not produce the seasonal cycle.

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