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Topic Geomagnetism
Asked 3 times across 3 UPSC exams over 21 years (2005–2026), peaking in 2005.
Key insights
- Most tested in CSE — 1 of 3 PYQs
- Most asked in 2005
- Recurs across 3 years (2005–2026)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 2005 → CDS 2018 → GEO 2026
How the concept evolved
Rising — more than half its appearances (2 of 3) are since 2016.
Related concepts
Ideas UPSC tests alongside this one — keep exploring.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
GEO2026
If the electric conductivity of the Earth's outer core is slightly decreased, then which one of the following is the most immediate effect?
- A Stronger geomagnetic field
- B Weaker geomagnetic field
- C Reversal of magnetic field
- D Disappearance of declination
Answer key not yet available (pending official release)
Science & Technology › Physics & Chemistry
CDS2018
The direction of magnetic field at any location on the earth's surface is commonly specified in terms of
- A field declination
- B field inclination
- C both field declination and field inclination ✓
- D horizontal component of the field
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
CSE2005
Consider the following statements
- The axis of the earth's magnetic field is inclined at 23 ½ to the geographic axis of the earth
- The earth's magnetic pole in the northern hemisphere is located on a peninsula in northern Canada
- Earth's magnetic equator passes through Thumba in South India
Which of the statements given above is/are correct?
- A 1,2 and 3
- B 2 and 3
- C 2 only
- D 3 only
Answer key not yet available (pending official release)
Geography › Geomorphology
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