Q139 / 160 · TS EAMCET 2025 (04 May Shift 2) · Physics

The air columns in two tubes closed at one end vibrating in their fundamental modes produce 2 beats per second. The number of beats produced per second when the same tubes are vibrated in their fundamental mode with their both ends open are

A
$1$
B
$2$
C
$3$
Correct answer
D
$4$

Hence, the correct answer is option: 'D'.

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