2. Solved Papers
  3. EAMCET Medical

EAMCET Medical EAMCET Medical Solved Paper-2007

  • question_answer
    To increase the frequency by 20%, the tension in the string vibrating on a sonometer has to be increased by

    A)  44%                                      

    B)  33%

    C)  22%                                      

    D)  11%

    Correct Answer: A

    Solution :

                     We know that   \[v\propto \sqrt{T}\] Let tension has to be increased by\[x%,\] then                 \[\frac{v+20%\,of\,v}{v}=\sqrt{\frac{T\times x%\,of\,T}{T}}\] \[\frac{6}{5}=\sqrt{\left( 1+\frac{x}{100} \right)}\] \[\frac{36}{25}=1+\frac{x}{100}\]                 or            \[x=44%\] Thus, tension has to be increased by 44%.


You need to login to perform this action.
You will be redirected in 3 sec spinner