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Topic Fundamental forces
Asked 2 times across 2 UPSC exams over 2 years (2013–2015), peaking in 2013.
Key insights
- Most tested in CSE — 1 of 2 PYQs
- Most asked in 2013
- Recurs across 2 years (2013–2015)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 2013 → CDS 2015
How the concept evolved
Largely a pre-2016 idea — watch for a comeback.
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.
CDS2015
In respect of the difference of the gravitational force from electric and magnetic forces, which one of the following statements is true ?
- A Gravitational force is stronger than the other two.
- B Gravitational force is attractive only, whereas the electric and the magnetic forces are attractive as well as repulsive.
- C Gravitational force has a very short range.
- D Gravitational force is a long range force, while the other two are short range forces. ✓
✓ Correct answer: (D)
Science & Technology › Physics & Chemistry
CSE2013
The known forces of nature can be divided into four classes, viz., gravity, electromagnetism, weak nuclear force and strong nuclear force. With reference to them, which one of the following statements is not correct?
- A Gravity is the strongest of the four ✓
- B Electromagnetism acts only on particles with an electric charge
- C Weak nuclear force causes radioactivity
- D Strong nuclear force holds protons and neutrons inside the nucleus of an atom
✓ Correct answer: (A)
Science & Technology › Physics & Chemistry
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