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GS Paper IUPSC Prelims 2006
Miscellaneous
Question No. 57Interactive Test Mode
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+2-0.66

Q57. Consider the following statements: 1. The Richter scale is a logarithmic scale and so an increase of 1 magnitude unit represents a factor of 10 times in amplitude. 2. Each integer reading of the Richter scale has an energy 100 times that of the previous integer reading. Which of the statement(s) given above is/are correct?

Consider the following statements:

  1. The Richter scale is a logarithmic scale and so an increase of 1 magnitude unit represents a factor of 10 times in amplitude.
  2. Each integer reading of the Richter scale has an energy 100 times that of the previous integer reading. Which of the statement(s) given above is/are 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 2006 • General Knowledge (1995-2010)

Correct Answer: Option (A) — 1 only

Concept & Option Breakdown

Standard Reference Verified

Statement 1 is correct: The Richter magnitude scale is base-10 logarithmic, meaning an increase of 1 magnitude unit corresponds to a 10-fold increase in measured wave amplitude. Statement 2 is incorrect: An increase of 1 unit on the magnitude scale corresponds to approximately 31.6 (or roughly 32) times more energy released, not 100 times.

Elimination Heuristic & Exam Approach

Recall standard seismology: 1 unit magnitude = 10x wave amplitude and ~32x energy release.

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2006 (Q57)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicGeneral Knowledge (1995-2010) → Miscellaneous
Official Answer KeyOption (A) — 1 only

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Frequently Asked Questions — UPSC Prelims 2006 Q57

What is the official answer for UPSC Prelims 2006 GS Paper I Question 57 (General Knowledge (1995-2010))?

The official UPSC answer key for this 2006 General Knowledge (1995-2010) (Miscellaneous) question is Option (A): "1 only". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2006 question belong to?

This question belongs to GS Paper I under the subject "General Knowledge (1995-2010)" and micro-topic "Miscellaneous". You can explore all repeated questions from Miscellaneous 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 Miscellaneous UPSC Prelims question using option elimination?

Recall standard seismology: 1 unit magnitude = 10x wave amplitude and ~32x energy release.

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