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using Mmnometer,, , Apparatus; Sonomoter, slotted weights with hanger, set of tuning forks, nates pad, ups paper, rider, meter ncale,, , , , Wooden box with holes HH] ——”, , , , Slotted weights (N:Node, A: Antinade), on hanger —>, (a) sonometer (b) vibrating wire, , os =, , , , , , , , , , , , , , , , , , Theory:, , Law of Length: The frequency of stationary transverse vibrations of a stretched string is ioversely, , proportional to its vibrating length when the tension and mass per unit length of the wire axe kept, constant,, , Thus nat +n€= constant when T and m are constont,, , Formula:, nag ft, 24\ m, Where ,, n = frequency of vibration of the wire., T = tension applied to the wire,, n = mass per unit length of the wire, € = vibrating length of the wire., Procedure :, , 1. Set up the sonometer on the table and clean the groove on the pulley to enoure that it hau, minimum friction. Stretch the wire by placing a suitable load on the hanger., , 2. Add suitable mass to the hanger to the sonometer wire. Keep it constant throughout th, experiment,, , 3. Place a light paper rider on the wire midway between knife edges., , 4. Take a tuning fork of highest frequency, strike it on the rubber pad and set into vibrations., , 5. Put the stem of vibrating tuning fork gently on the sonometer box., , 2a, , — ocanned with Lamscann

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Groph : Agraph of 1/2 angainst n ., Scale Y=———cm", , , , , , , , , , 1 ‘ Xe——He, zlem"), 4, e, 4, Result os, 1. RE cssesnceey .- = constant, when T and m are kept constant, Hence law of length is verified., 2. The graph of reciprocal of vibrating length against frequency of vibrations of wire is straight, line. Hencen x 1, £, 43 Unknown frequertcy of tuning fork by calculation n'= ..24) 5, 4. Unknown frequency of tuning fork by graph n'=............, , Precautions :, , 1. Place the paper rider mid — way between knife edges., , 2. Paper rider should be light and dry., , 3. Strike tuning fork on the rubber pad gently., , 4, Place the stem of the vibrating tuning fork gently on the sonometer box., 5. Measure the distances between the knife-edges accurately., , [Questions, 1. State the law of length of vibrating string. —_, , , , 2 Whot is fundamental mode of vibration?, , , , Scanned with CamScann