MCQ
The two nearest harmonics of a tube closed at one end and open at other end are $220\,\, Hz$ and $260\,\, Hz.$ What is the fundamental frequency of the system .... $Hz$ ?
- A$10$
- ✓$20$
- C$30$
- D$40$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$Reason$ : A man standing at rest on smooth horizontal surface cannot start walking due to absence of friction (The man is only in contact with floor as shown).
