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Frequency

5 PYQ across 3 exams · 1994–2024 — the complete chronological timeline of how UPSC has tested this idea, oldest to newest.

CSE 1994 → NDA 2021 → CISF 2023
19941 PYQ
CSEQ38
The pitch of the voice of women is in general…
20212 PYQs
NDAQ90
Which one of the following cannot be the unit of frequency of a sound wave ?…
NDAQ92
Light waves are incident on an air-glass boundary. Some of the light waves are reflected and some are refracted in the glass. Which one of t…
20231 PYQ
CISFQ26
Which one among the following statements regarding sound is correct?…
20241 PYQ
NDAQ122
The AC mains domestic supply current in India changes direction in every…
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