Year: 2018
Topic: Waves
Time :
1.
The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is \(20\,cm\), the length of the open organ pipe is
(1). \(13.2\,cm\)
(2). \(8\,cm\)
(3). \(12.5\,cm\)
(4). \(16\,cm\)