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JEE Main 10 Jan 2019 Shift 2 Solved Paper
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© examsnet.com
Question : 21
Total: 90
A closed organ pipe has a fundamental frequency of 1.5 kHz. The number of overtones that can be distinctly heard by a person with this organ pipe will be :
(Assume that the highest frequency a person can hear is 20,000 Hz)
7
5
6
4
Validate
Solution:
For closed organ pipe, resonate frequency is
odd multiple of fundamental frequency.
∴ (2n + 1)
f
0
≤ 20,000
(
f
o
is fundamental frequency = 1.5 KHz)
∴ n = 6
∴ Total number of overtone that can be heared
is 7. (0 to 6).
© examsnet.com
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