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GS Paper IUPSC Prelims 2013
Health & Medicine
Question No. 193Interactive Test Mode
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Q193. The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?

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 • Science and Technology

Correct Answer: Option (A) — Gravity is the strongest of the four

Concept & Option Breakdown

Standard Reference Verified

Option (a) is the incorrect statement (and thus the correct answer): Gravitational force is the weakest of the four fundamental forces in nature, despite having infinite range. The relative strength order is: Strong Nuclear Force > Electromagnetic Force > Weak Nuclear Force > Gravitational Force.

Elimination Heuristic & Exam Approach

Look for statements stating extremes: Calling gravity 'the strongest of the four' directly contradicts standard physics where gravity is well known as the weakest fundamental force.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2013 (Q193)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicScience and Technology → Health & Medicine
Official Answer KeyOption (A) — Gravity is the strongest of the four

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Frequently Asked Questions — UPSC Prelims 2013 Q193

What is the official answer for UPSC Prelims 2013 GS Paper I Question 193 (Science and Technology)?

The official UPSC answer key for this 2013 Science and Technology (Health & Medicine) question is Option (A): "Gravity is the strongest of the four". 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 "Science and Technology" and micro-topic "Health & Medicine". You can explore all repeated questions from Health & Medicine 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 Health & Medicine UPSC Prelims question using option elimination?

Look for statements stating extremes: Calling gravity 'the strongest of the four' directly contradicts standard physics where gravity is well known as the weakest fundamental force.

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