Describe an experiment to investigate the variation of frequency with length for vibrating wires

Describe an experiment to investigate the variation of frequency with length for vibrating wires

• The wooden bridges B and C vary the effective length of the wire, L.
• Constant tension in the wire is maintained by the fixed mass
• A paper rider is place on the wire in the middle of BC and a sounding fork placed near it.
• The position of the bridge C is varied until sound is heard.
• The distance between the bridges L and the frequency, f, of the tuning fork is noted.
• The procedure is repeated for various tuning forks and values of L, f and 1/L are tabulated
• A plot of f against 1/L gives a straight line showing that the frequency of vibration of the wire is inversely proportional to length.

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