Combined Geo-Scientist 2021 Paper II Geophysics Question Paper PDF

Central Government Jobs Other Jobs 2021

  • Year 2021
  • Conducted By UPSC
  • Languages English

Exam Details

Detail Information
Examination Combined Geo-Scientist (Preliminary) Examination
Year 2021
Conducting Body UPSC
Paper Paper-II (Geophysics)
Subject Geophysics
Question Type Objective (MCQ)

This document contains the UPSC Combined Geo-Scientist (Preliminary) Examination 2021, Paper-II, focusing on Geophysics. It includes objective-type questions designed to assess candidates' understanding of core concepts in geophysics, satellite dynamics, celestial mechanics, and earth's magnetism. This paper is crucial for aspirants preparing for the Geo-Scientist examination, offering valuable insights into the exam's difficulty level, question patterns, and key topics. Practicing with this paper helps candidates gauge their preparation and identify areas for improvement.

Major Topics Covered

  • Satellite Dynamics
  • Orbital Mechanics
  • Gravitation
  • Earth's Magnetic Field
  • Celestial Mechanics
  • Stellar Evolution
  • Meteorites

Why This Paper is Important

  • Useful for Combined Geo-Scientist (Preliminary) Exa 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 (Preliminary) Examination 2020 Paper-II (Geophysics)
  • Combined Geo-Scientist (Preliminary) Examination 2022 Paper-II (Geophysics)
  • Combined Geo-Scientist (Main) Examination 2021 Paper-II (Geophysics)
  • Combined Geo-Scientist (Preliminary) Examination 2021 Paper-II (Geophysics) Answer Key
  • Combined Geo-Scientist (Preliminary) Examination Syllabus
  • Geophysics Syllabus for Competitive Exams
  • Combined Geo-Scientist (Preliminary) Examination Pattern
  • UPSC Exam Pattern for Geo-Scientist

Instructions

  • A particle with kinetic energy equal to \frac{GMm}{R} on the surface of rotating earth will: (a) Start rotating around the earth (b) Escape from the earth (c) Remain on the earth with maximum potential energy (d) Reach the equator
  • A satellite is revolving round the earth at a height of 600 km.
  • Considering the radius of the earth as 6400 km, the mass of the earth as 6 \times 10^{24} kg and gravitational constant (G) as 6.67 \times 10^{-11}Nm2/kg2, the time period of the satellite will be: (a) 4.8 \times 10^3 s (b) 4.8 \times 10^6 s (c) 5.8 \times 10^3 s (d) 4.2 \times 10^2 s
  • The most studied and largest fraction of the meteorites recovered on the earth is: (a) Achondrites (b) Chondrites (c) Iron (d) Iron-stony
  • Which one of the following statements is true for planets revolving around the Sun?

Questions (page 2)

Q6. Consider the following statements:
Statement-1: The earth's gravity increases from equator to pole
Statement-2: The equatorial bulge places an excess mass at equator, which causes the decrease in gravity at the equator
Which one of the following is correct in respect of above statements?

  • (a) Both Statement-1 and Statement-2 are true and Statement-2 is the correct explanation of Statement-1
  • (b) Both Statement-1 and Statement-2 are true but Statement-2 is not the correct explanation of Statement-1
  • (c) Statement-1 is true but Statement-2 is false
  • (d) Statement-1 is false but Statement-2 is true

Q7. The geostationary orbit of a satellite around the earth is such that the satellite remains stationary with respect to the earth. It requires that the orbit must be:

  • (a) Geosynchronous, elliptical with height from the surface of earth nearly 36,000 km
  • (b) Geosynchronous, circular with height from the surface of earth nearly 36,000 km
  • (c) Geosynchronous, circular and stays over the geographical poles of earth at a height of nearly 36,000 km
  • (d) Geosynchronous, orthogonal above the south pole at a height of nearly 36,000 km

Q8. Major component of earth's magnetic field comes from:

  • (a) Core
  • (b) Crust
  • (c) Mantle
  • (d) Ionosphere

Q9. Which one of the following properties always exists in presence of magnetic field?

  • (a) Ferromagnetism
  • (b) Paramagnetism
  • (c) Antiferromagnetism
  • (d) Diamagnetism

Q10. Which one of the following statements regarding earth's magnetism is true?

  • (a) A freely suspended magnet will be vertical at the equator
  • (b) Magnetic meridian at a place is a line passing through the axis of a freely suspended magnet
  • (c) At poles, the angle of dip is 0° and horizontal component of earth's magnetic field is also zero
  • (d) Lines joining the points of same declination on the earth surface are called isogonic lines

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Frequently asked questions

What is the name of the examination?

The examination is the Combined Geo-Scientist (Preliminary) Examination.

Which year is this question paper from?

This question paper is from the year 2021.

Which paper is this question paper?

This is Paper-II, focusing on Geophysics.

Who conducts the Combined Geo-Scientist Examination?

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

What is the question format for this paper?

The questions in this paper are objective (multiple-choice).

What is the subject of Paper-II?

Paper-II is on Geophysics.

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