Topic Acoustics
Asked 2 times across 2 UPSC exams over 8 years (2016–2024), peaking in 2024.
Key insights
- Most tested in CAPF — 1 of 2 PYQs
- Most asked in 2024
- Recurs across 2 years (2016–2024)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CDS 2016 → CAPF 2024
How the concept evolved
Rising — more than half its appearances (2 of 2) 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.
CAPF2024
Which one of the following is the audible range of hearing for humans?
- A 20 kHz – 200 kHz
- B 20 Hz – 20 kHz ✓
- C 20 Hz – 35 kHz
- D 20 Hz – 40 kHz
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
CDS2016
Which one of the following statements is not correct?
- A The response of the ear to sound of increasing intensity is approximately logarithmic.
- B The sensitivity of the human ear does not vary with the frequency of the sound. ✓
- C When two or more waves traverse the same medium, the displacement of any element of the medium is the algebraic sum of the displacements due to each wave.
- D Longitudinal waves can travel in all media—solids, liquids and gases.
✓ Correct answer: (B)
Science & Technology › Physics & Chemistry
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