Physics - Wave on String Question with Solution | TestHub

For Melde's experiment. ${\mathrm{TP}}^2=$ constant where $\mathrm{T}$ is the tension and $\mathrm{P}$ is the number of loops. $$\begin{array}{l}\therefore {\mathrm{T}}_1{\mathrm{P}}_1{}^2={\mathrm{T}}_2{\mathrm{P}}_2{}^2\\ \therefore {\mathrm{T}}_1(4{)}^2=\left({\mathrm{T}}_1-0.009\right)(5{)}^2\\ \therefore 9{\mathrm{T}}_1=0.009\times 25\\ \therefore {\mathrm{T}}_1=0.025\mathrm{kg}-\mathrm{wt}\end{array}$$