The fundamental note produced by a closed organ pipe is of frequency f. The fundamental note produced by an open organ pipe of same length will be of frequency

(1) $\frac{f}{2}$

(2) f

(3) 2f

(4) 4f

(3) ${n}_{\text{closed}}=\frac{v}{4l},{n}_{\text{open}}=\frac{v}{2l}$${n}_{\text{open}}=2{n}_{\text{closed}}=2f$

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