What constants are provided in the exam for reference?

Physical constants such as electron mass, proton mass, neutron mass, atomic mass unit, Bohr magneton, nuclear magneton, Boltzmann constant, gravitational constant, permeability and permittivity of free space are provided.

What is the significance of the symbol conventions in this paper?

Symbols and notations have their usual standard meanings; assume suitable data if necessary and indicate it clearly.

What is the acceptable scope for answering in terms of page use?

Answers must be written in the QCA booklet; any page or portion left blank should be clearly struck off.

Is page 2 content relevant to the SEO metadata for this entry?

Yes. Page 2 content is used to repair OCR, extract questions, and enrich FAQ, topics, tags, and summary for better SEO alignment.

Where can the full page URL for this paper be found?

http://localhost/quizcurrent.com/question-papers/region/central-government-jobs/other/pdf/185

Geophysics Paper II UPSC 2025 Main

Name: Geophysics Paper II UPSC 2025 Main
Creator: UPSC
Keywords: Geophysics, UPSC, Geophysics Paper II, Combined Geo-Scientist, Main Examination, BP, BGSP-B-GPH, Seismology, Magnetic methods, Ground Penetrating Radar, Temperature log, Seismic sources, Pole-dipole, Magnetic anomaly, Seismic multiples

Central Government Jobs Other Jobs 2025

Year 2025
Conducted By BGSP-B-GPH
Questions 10
Maximum Marks 200
Duration Three Hours Maximum Marks: 200

Exam Details

Detail	Information
Examination	Combined Geo-Scientist (Main) Examination
Year	2025
Conducting Body	BGSP-B-GPH
Paper	Geophysics
Subject	Geophysics
Duration	Three Hours Maximum Marks: 200
Maximum Marks	200
Number of Questions	10

This record compiles the Geophysics Paper II for the UPSC Combined Geo-Scientist (Main) Examination 2025. It includes exam metadata, structure, and a repaired OCR of page 2 with descriptive questions (Q1 and Q2) and subparts covering magnetic methods, seismic sources, ray paths, temperature logging, GPR, seismic noise, and uphole surveys. Page 1 provides exam instructions and physical constants. Page 2 expands on topics for detailed qualitative answers and prepares SEO-friendly metadata, FAQ, and image SEO to support search visibility.

Major Topics Covered

Geophysics
Seismology
Magnetic methods
Electrical geophysics
Potential field methods
Ground Penetrating Radar
Geophysical logging
Seismic reflection
Seismic exploration
Ray tracing
Pole-dipole array
Magnetic anomaly
Dielectric properties
Time-depth conversion
Multiples in seismic
Uphole survey
Noise analysis in seismic
Temperature log
Dielectric constant
Electromagnetic induction

Why This Paper is Important

Useful for UPSC Combined Geo-Scientist (Main) Exami 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

Instructions

There are TEN questions divided under 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 may be drawn to illustrate answers, wherever required.
These 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.
Physical Constants:
109 \times 10^{-31} kg Electron rest mass, m_{\rm o} =
672 \times 10^{-27} kg Proton rest mass, m_p = =
675 \times 10^{-27} kg Neutron rest mass, m_n Atomic mass unit (C^{12} \equiv 12), a. m. u. 661 \times 10^{-27} kg
27 \times 10^{-24} J/tesla Bohr magneton, \mu_B =
05 \times 10^{-27} J/tesla Nuclear magneton, \mu_N =
381\times10^{-23}\text{ J/K} Boltzmann constant, k_B = 6{\cdot}67 \times 10^{-11} N-m^2/kg^2 Universal gravitational constant, G = 4\pi \times 10^{-7} Wb/Am Magnetic permeability of free space, \mu_0 \equiv
85 \times 10^{-12} F/m Permittivity of free space, \varepsilon_0 =.

Questions (page 2)

Q2. What are the different noises present in seismic prospecting? (i) $\overline{4}$ (ii) Explain the use of uphole survey in seismic prospecting with a simple procedure involved in the survey. Draw a neat sketch explaining the quantities in it. 6 BGSP-B-GPH 2

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Geophysics Paper II UPSC 2025 Main — page 1 instructions scan PDF download — Page 1

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Frequently asked questions

What is the duration and total marks for the Combined Geo-Scientist (Main) Geophysics Paper II?

Three hours; Maximum marks are 200.

How many questions must a candidate attempt in the paper?

There are ten questions in total; candidates must attempt six questions, with questions 1 and 6 compulsory.

Are answers required to be written in a particular language?

Answers must be written in English only.

From which sections should candidates select questions?

Out of the remaining questions after attempting questions 1 and 6, four questions must be attempted selecting two from each section.

What are the common topics covered in Geophysics Paper II?

Topics include magnetic methods and anomalies, pole-dipole arrays, seismic sources and ray paths, short-path and long-path multiples in seismic reflection, temperature logging, Ground Penetrating Radar (GPR) vs electromagnetic induction, dielectric constants and velocity calculations, and uphole surveys.

What are the general instructions for sketching in the answer booklets?

Neat sketches may be drawn to illustrate answers wherever required; sketches should be drawn in the space provided for answering.

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