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15. Wave Motion and Waves on a String
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Q40 of 97 Page 323

A one-metre long stretched string having a mass of 40 g is attached to a tuning fork. The fork vibrates at 128 Hz in a direction perpendicular to the string. What should be the tension in the string if it is to vibrate in four loops?

164 N

Given, L=1 m


N=4



So,


Now, we know that,



=164 N


More from this chapter

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38

A sonometer wire having a length of 150 m between the bridges vibrates in its second harmonic in resonance with t tuning fork of frequency 256 Hz. What is the speed of the transverse wave on the wire?

39

The length of the wire shown in figure (15-E8) between the pulley is 15 m and its mass is 120 g. Find the frequency of vibration with which the wire vibrates in two loops leaving the middle point of the wire between the pulleys at rest.


41

A wire, fixed at both ends is seen to vibrate at a resonant frequency of 240 Hz and also at 320 Hz. (A) What could be the maximum value of the fundamental frequency? (B) If transverse waves can travel on this string at a speed of 40 m s−1, what is its length?

42

A string, fixed at both ends, vibrates in a resonant mode with a separation of 20 cm between the consecutive nodes. For the next higher resonant frequency, this separation is reduced to 16 cm. Find the length of the string.

Questions · 97
15. Wave Motion and Waves on a String
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