Combined Geo-Scientist 2024 Geo-Physics Paper I Question Paper PDF

Central Government Jobs Other Jobs 2024

  • Year 2024
  • Conducted By UPSC
  • Maximum Marks 200
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination Combined Geo-Scientist (Main) Examination
Year 2024
Conducting Body UPSC
Paper Geo-Physics Paper - I
Subject Geo-Physics
Duration Three Hours
Maximum Marks 200
Question Type Descriptive / Subjective

This document contains the Geo-Physics Paper I for the Combined Geo-Scientist (Main) Examination 2024, conducted by UPSC. The paper is divided into two sections, with specific instructions on compulsory questions and the number of questions to be attempted from each section. Answers are to be written in English only. This paper is crucial for aspirants preparing for the Geo-Physics discipline within the Combined Geo-Scientist examination, offering insights into the types of questions and the depth of knowledge required.

Major Topics Covered

  • Adams–Williamson equation
  • Geophysics applications
  • Body-wave velocity
  • Earth Model IASP91
  • Fermat's principle
  • Snell's law
  • Magnetic dipole
  • Magnetic effects
  • Covariance matrix
  • Inverse problem
  • Model parameters
  • Standard deviation
  • Kepler's laws of planetary motion
  • Elliptical orbit
  • Aphelion
  • Perihelion
  • Perigee
  • Apogee
  • Newton's law of gravitation
  • Satellite acceleration
  • Matrix inverse
  • 2x2 square matrix
  • 3x3 square matrix

Why This Paper is Important

  • Useful for Combined Geo-Scientist (Main) Examinatio preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

  • Combined Geo-Scientist (Main) Examination 2023 Geo-Physics Paper I
  • Combined Geo-Scientist (Main) Examination 2024 Geo-Physics Paper II
  • Combined Geo-Scientist (Main) Examination 2024 Geology Paper I
  • Combined Geo-Scientist (Main) Examination 2024 Chemistry Paper I
  • Combined Geo-Scientist (Main) 2024 Geo-Physics Paper I Answer Key
  • UPSC Geo-Scientist 2024 Geo-Physics Paper I Solutions
  • Combined Geo-Scientist (Main) Geo-Physics Syllabus
  • UPSC Geo-Scientist Exam Syllabus

Instructions

  • There are TEN questions divided in TWO sections.
  • Candidate has to attempt SIX questions in all.
  • Out of the remaining EIGHT questions, FOUR questions are to be attempted choosing TWO from each Section.
  • The number of marks carried by a question / part is indicated against it.
  • Neat sketches are to be drawn to illustrate answers, wherever required.
  • They shall be drawn in the space provided for answering the question itself.
  • Unless otherwise mentioned, symbols and notations have their usual standard meanings.
  • Assume suitable data, if necessary, and indicate the same clearly.
  • Attempts of questions shall be counted in sequential order.
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Any page or portion of the page left blank in the Question-cum-Answer (QCA) Booklet must be clearly struck off.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Section A

Q1. Derive Adams–Williamson equation and its application in Geophysics. Also give variation of Body-wave velocity (α) in the Earth's interior according to Earth Model IASP91.

(a) State Fermat's principle and derive Snell's law using the same principle for geometry of incident and refracted ray on horizontal interface.

(b) Write down the condition under which the magnetic dipole is presumed to be a point or isolated pole. Draw the magnetic effects in terms of H, Z and F profiles due to an isolated pole for I = 45\circ, where I is the field inclination.

(c) The diagonal elements of a covariance matrix computed for a linearized inverse problem having model parameters m1, m2, m3, m4, m5 are 49, 15, 3, 200, 40 respectively. Compute the standard deviation in the estimation of model parameter m4.

Section A

Q2. Give Kepler's laws of planetary motion relating the empirical laws as expressions of fundamental physical laws.

(a) Define the following terms as parameters of an elliptical orbit :
(1) Aphelion and Perihelion
(2) Perigee and Apogee

(b) Explain, briefly, Newton's law of gravitation. If a satellite is orbiting the Earth 250 km above the surface, what acceleration due to gravity does it experience ? Given that the radius of the Earth is 6.38 × 106 m and the mass of the Earth is 5.98 × 1024 kg.

(c) Find the general formula for inverse of 2 × 2 square matrix.

(d) Compute the inverse of the 3 × 3 square matrix given as
A = \beginbmatrix 2 & 4 & 3 \\ 1 & -2 & -2 \\ -3 & 3 & 2 \endbmatrix.

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Frequently asked questions

What is the name of the exam for which this paper is intended?

This paper is for the Combined Geo-Scientist (Main) Examination.

What is the subject of this paper?

The subject is Geo-Physics, Paper I.

Which conducting body organizes this examination?

The examination is conducted by UPSC (Union Public Service Commission).

What is the year of this question paper?

The year of this question paper is 2024.

What is the paper code mentioned on the document?

The paper code is SGSE-P-GPH.

How many sections are there in the paper?

There are two sections in the paper.

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