Waves - Result Question 51
53. 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
[1993]
(a) $0.25 m$
(b) $0.5 m$
(c) $1 m$
(d) $2 m$
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Answer:
Correct Answer: 53. (d)
Solution:
- (d) $f=\frac{1}{2 l}[\frac{T}{\mu}]^{\frac{1}{2}}$. When $f$ is halved, the length is doubled.
