Q 11-14-018NEETJEE MainEasy
The fundamental frequency of a pipe closed at one end is $200$ Hz. The frequency of its second overtone is
Answer: (B) $1000$ Hz
Concept. A closed pipe has only odd harmonics: $f, 3f, 5f, \dots$
Step 1. Second overtone. It is the third allowed mode: $5f = 5 \times 200 = 1000$ Hz.
Answer. $1000$ Hz (Option B).
Solution by Sreeraj P, M.Sc Physics