A string in musical instrument is 50 cm long and its fundamental frequency is 800 Hz. If a frequency

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14.Waves and Sound

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A string in musical instrument is $50 cm$ long and its fundamental frequency is $800 Hz.$ If a frequency of $1000 Hz$ is to be produced, then required length of string is ..... $cm$

A

$62.5$

B

$50$

C

$40$

D

$37.5$

(AIIMS-2002)

Solution

(c) ${n_1}{l_1} = {n_2}{l_2} \Rightarrow 800 \times 50 = 1000 \times {l_2} \Rightarrow {l_2} = 40$$cm$

Standard 11

Physics

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