A closed organ pipe of length \( \ell \) is sounded together with another closed organ pipe of l...
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0A closed organ pipe of length \( \ell \) is sounded together with another closed organ pipe of length
\( \mathrm{P} \) \( \ell+\mathrm{x}(\mathrm{x}\ell) \) both in fundamental mode. If
W \( v= \) speed of sound, the beat frequency heard is:
(1) \( \frac{v x}{2 \ell^{2}} \)
(2) \( \frac{v X}{4 \ell^{2}} \)
(3) \( \frac{v x^{2}}{4 \ell} \)
(4) \( \frac{V X}{\ell^{2}} \)
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