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In a sanometer experiment, resonance is ...

In a sanometer experiment, resonance is obtained whth the experimental wire has a length of 21 cm between the bridges and the vibrations are excited by a tunning fork of frequency 256 Hz. If a tuning fork of frequency6 384 Hz is used, what should be the lenght of the experimental wire to get the resonance.

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By the law of length `l_1v_l=l_2v_2`
or `l_2=v_1/v_2=256/384xx21cm=14cm.
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