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Describe a procedure formeasuring the velocity of sound in a stretched string. |
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Answer» Solution :The velocity of a transversewave travelling along a stretched string in fundamental mode is given by `V = 2vl` , where v =frequency, l = RESONATING length . Measuring of velocity of sound in a stretched string using sonometer`:` (1) THEWIRE is subjected to a fixed tension with suitable load. (2) A tunning fork of known frequency(v), is exicted and the stem is held against the sononmeter box. (3) The distance between the two bridges is adjusted such that a small paper rider at the middle of `B_(1)B_(2)`VIBRATES vigorouslyand flies off due to resonance. (4)The resonating length 'l' can be measuredbetween two bridges with scale. (5) By knowingv and l, we can find the velocityof a wave using `upsilon = 2vl`. 
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