SATHEE: Wave Motion 2 Question 25

Wave Motion 2 Question 25

25. A tube, closed at one end and containing air, produces, when excited, the fundamental note of frequency $512 H z$ . If the tube is opened at both ends the fundamental frequency that can be excited is (in $H z$ )

(1986, 2M)

(a) 1024

(b) 512

(c) 256

(d) 128

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Answer:

Correct Answer: 25. (a)

Solution:

$f_{c} = \frac{v}{4 l} = 512 H z$

$f_{o} = \frac{v}{2 l} = 2 f_{c} = 1024 H z$

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Wave Motion 2 Question 25

25. A tube, closed at one end and containing air, produces, when excited, the fundamental note of frequency 512Hz. If the tube is opened at both ends the fundamental frequency that can be excited is (in Hz )

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25. A tube, closed at one end and containing air, produces, when excited, the fundamental note of frequency $512 H z$ . If the tube is opened at both ends the fundamental frequency that can be excited is (in $H z$ )