Question

If the length of the string between the bridges of a sonometer wire is changed by a small amount , the fractional change $\frac{\Delta f}{f}$in the fundamental frequency is

• A.
• B.
• C.
• D.

Answer 1

The correct option is B

$f=\frac{1}{2L}\sqrt{\frac{T}{m}}$ or $f=\frac{K}{L}$

$\frac{\Delta f}{f}=\frac{-\Delta L}{L}$