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GS Paper IUPSC Prelims 2013
Human & Political Geography
Question No. 3Interactive Test Mode
00:00
+2-0.66

Q3. Variations in the length of daytime and night time from season to season are due to :

Variations in the length of daytime and night time from season to season are due to :

Select the correct option below (or cross out options to eliminate)
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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2013 • Geography

Correct Answer: Option (D) — Revolution of the earth on a tilted axis

Concept & Option Breakdown

Standard Reference Verified

The Earth's axis is tilted at an angle of 23.5° from the perpendicular to its orbital plane. As the Earth revolves around the Sun on this tilted axis, different parts receive varying durations of sunlight throughout the year, causing seasonal variations in day and night lengths.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2013 (Q3)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicGeography → Human & Political Geography
Official Answer KeyOption (D) — Revolution of the earth on a tilted axis

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Frequently Asked Questions — UPSC Prelims 2013 Q3

What is the official answer for UPSC Prelims 2013 GS Paper I Question 3 (Geography)?

The official UPSC answer key for this 2013 Geography (Human & Political Geography) question is Option (D): "Revolution of the earth on a tilted axis". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2013 question belong to?

This question belongs to GS Paper I under the subject "Geography" and micro-topic "Human & Political Geography". You can explore all repeated questions from Human & Political Geography in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Human & Political Geography UPSC Prelims question using option elimination?

To solve Human & Political Geography questions in UPSC Prelims, identify extreme modifiers, verify core NCERT conceptual definitions, and eliminate mutually contradictory statement pairs before locking your final option.

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