A tuning fork gives 4 beats with \( 50 \mathrm{~cm} \) length of a sonometer wire. If the length...

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A tuning fork gives 4 beats with \( 50 \mathrm{~cm} \) length of a sonometer wire. If the length of the wire is shortened by \( 1 \mathrm{~cm} \) then no. of beats still the same. The frequency of the fork is -
(1) 396
(2) 400
(3) 404
(4) 384
\( +0 \)
ค:
\( =8 \)
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