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Grade 12Engineering Entrance Exams

A vibrating sonometer wire is in resonance with a tuning fork of frequency 150 Hz. If only one loop is formed on the wire and the length of one loop is 40 cm, then the velocity of transverse waves on the wire will be (a) 120 m/s (b) 240 m/s (c) 90 m/s (d) 60 m/s

Profile image of Shwetabh
12 Years agoGrade 12
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2 Answers

Profile image of Saurabh Koranglekar
6 Years ago
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Profile image of Vikas TU
6 Years ago
Dear studentlength of the sonometer wire is 
L=40cm=.40m
fundamental frequency f0=150Hz
when the fundamental wave is produced we have
λ/2=0.40m
⇒λ=0.80m
wave speed v=f0λ
⇒v=150×0.80=120m/sOption (1) is correctRegards

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