If the tension in a stretched string fixed at both ends is changed by 20%, the fundamental frequency

Question

If the tension in a stretched string fixed at both ends is changed by 20%, the fundamental frequency is found to increase by 15Hz. then the

Accepted Answer

Sol. v = $\sqrt{\frac{T}{\mu}}$ v' = $\sqrt{\frac{1.2T}{\mu}}$ = v$\sqrt{1.2}$ = 1.095 v≅ 1.1 vf0 = $\frac{v}{2L}$f0' = 1.095 f0⇒∆f = 0.095 f0For fundamental modeL = $\frac{\lambda}{2}$⇒λ = 2L, L does not change, hence λ

Question

Options

Solution

More Wave motion Questions