JEE MAIN - Physics (2022 - 25th June Morning Shift - No. 22)
The first overtone frequency of an open organ pipe is equal to the fundamental frequency of a closed organ pipe. If the length of the closed organ pipe is 20 cm. The length of the open organ pipe is _____________ cm.
Svar
80
Forklaring
$$2 \times \left( {{V \over {2{L_0}}}} \right) = \left( {{V \over {4{L_c}}}} \right)$$
$$ \Rightarrow {L_0} = 4{L_c}$$
$$ = 4 \times 20$$
$$ = 80$$ cm