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14. waves and sound — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics14. waves and sound1 Mark
MCQ
A stretched string resonates with tuning fork frequency $512\; Hz$ when length of the string is $0.5\; m$. The length of the string required to vibrate resonantly with a tuning fork of frequency $256 \;Hz$ would be .......... $m$
  • A
    $025$
  • B
    $0.5$
  • C
    $2$
  • ✓
    $1$
✓

Answer

Correct option: D.
$1$
d
$f=\frac{1}{2 l}\left[\frac{T}{\mu}\right]^{\frac{1}{2}}$

When $f$ is halved, the length is doubled.

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