Question

A cylindrical tube, open at both ends, has fundamental frequency $n$. If one of the ends is closed, the fundamental frequency will become

• A. $\frac{n}{2}$
• B. $n$
• C. $2n$
• D. $4n$

Answer 1

The correct option is A $\frac{n}{2}$

The value of $\lambda$ for a pipe open at both ends is $2L$ where $L$ is the length of the pipe. For a closed pipe $\lambda =4L$.
Since $\lambda$ becomes twice, the frequency will reduce to half. Hence, the correct choice is (a).