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GS Paper IUPSC Prelims 2002
Space & ISRO
Question No. 133Interactive Test Mode
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Q133. Assertion (A): Artificial satellites are always launched from the earth in the eastward direction. Reason (R): The earth rotates from west to east and so the satellite attains the escape velocity.

Assertion (A): Artificial satellites are always launched from the earth in the eastward direction. Reason (R): The earth rotates from west to east and so the satellite attains the escape velocity.

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Official Answer Key & Detailed Solution

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Official UPSC Answer KeyUPSC Prelims 2002 • Science and Technology

Correct Answer: Option (C) — A is true but R is false

Concept & Option Breakdown

Standard Reference Verified

• Assertion (A) is true: Launching rockets towards the east leverages the Earth's rotational speed (which moves west to east), providing an initial velocity boost to help reach orbital velocity more efficiently with less propellant. • Reason (R) is false: The Earth's rotation provides a boost towards orbital velocity (~7.8 km/s for Low Earth Orbit), not escape velocity (~11.2 km/s), which is the speed needed to break free entirely from Earth's gravitational field.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2002 (Q133)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Space & ISRO
Official Answer KeyOption (C) — A is true but R is false

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Frequently Asked Questions — UPSC Prelims 2002 Q133

What is the official answer for UPSC Prelims 2002 GS Paper I Question 133 (Science and Technology)?

The official UPSC answer key for this 2002 Science and Technology (Space & ISRO) question is Option (C): "A is true but R is false". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2002 question belong to?

This question belongs to GS Paper I under the subject "Science and Technology" and micro-topic "Space & ISRO". You can explore all repeated questions from Space & ISRO 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 Space & ISRO UPSC Prelims question using option elimination?

To solve Space & ISRO 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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