Pipe A has two open ends. Pipe B has only one open end. Which of the following i
ID: 1390823 • Letter: P
Question
Pipe A has two open ends. Pipe B has only one open end. Which of the following is true?
A. A can have only odd harmonics. B can have both odd and even harmonics.
B. A can have both odd and even harmonics. B can have only even harmonics.
C. A can have both odd and even harmonics. B can have both odd and even harmonics.
D. A can have both odd and even harmonics. B can have only odd harmonics.
E. A can have only even harmonics. B can have both odd and even harmonics.
F. A can have only even harmonics. B can have only odd harmonics.
Explanation / Answer
For a pipe with two ends open, the formula for frequency f = n x v/2L for n =1,2,3 ....
For a pipe with only one end open, the formula for frequency f = n x v/4L for n =1,3, 5 ....
Thus Pipe A can have both odd and even harmonics while B can have only odd harmonics. So answer is option D