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Topic Piezoelectric effect
Asked 2 times across 2 UPSC exams over 24 years (1993–2017), peaking in 1993.
Key insights
- Most tested in CSE — 1 of 2 PYQs
- Most asked in 1993
- Recurs across 2 years (1993–2017)
How it travelled across exams
First appearance in each exam — the same idea, reframed.
CSE 1993 → CDS 2017
How the concept evolved
Long-running — most appearances (1 of 2) predate 2016, and it still returns.
Sample questions
You've seen the pattern — here are a few of the actual PYQs.
CDS2017
Ultrasonic waves are produced by making use of
- A ferromagnetic material
- B ferrimagnetic material
- C piezoelectric material ✓
- D pyroelectric material
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
CSE1993
The working of the quartz crystal in the watch is based on the
- A Photoelectric Effect
- B Johnson Effect
- C Piezoelectric Effect ✓
- D Edison Effect
✓ Correct answer: (C)
Science & Technology › Physics & Chemistry
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