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Topic Magnetic field
Asked 3 times across 2 UPSC exams over 4 years (2022–2026), peaking in 2022.
Key insights
- Most tested in GEO — 2 of 3 PYQs
- Most asked in 2022
- Recurs across 3 years (2022–2026)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
NDA 2022 → GEO 2025
How the concept evolved
Rising — more than half its appearances (3 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
Which of the following fields could bring a deflection in an electron beam?
- A Electric field only
- B Magnetic field only
- C Either electric field or magnetic field or both
- D Neither electric field nor magnetic field
Answer key not yet available (pending official release)
Science & Technology › Physics & Chemistry
GEO2025
A cyclotron has an oscillator frequency of 12×10⁶ Hz and 'Dee' radius of 21 inches. The value of magnetic induction (field) needed to accelerate a deuteron (mass = 3.34×10⁻²⁷ kg and charge = 1.6×10⁻¹⁹ C) is
- A 1.573 tesla ✓
- B 157.3 tesla
- C 15.73 tesla
- D 0.157 tesla
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
NDA2022
The presence of magnetic field can be determined using which one of the following instruments?
- A Ammeter
- B Voltmeter
- C Magnetic needle ✓
- D Motor
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
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