2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-75

  • question_answer
    The frequency of fundamental note in a wire stretched under tension T is f. If the tension is increased to 25 T, then the frequency of the fundamental note will be                                                         

    A)  5 f                              

    B)  f

    C)  25 f                             

    D)  \[\frac{f}{5}\]

    Correct Answer: A

    Solution :

    The fundamental frequency is \[f=\frac{1}{2L}\sqrt{\frac{t}{M}}\] \[\therefore \,\,\,\,\,\,\,\,\,\,\,\,\,\frac{f'}{f}=\sqrt{\frac{T'}{T}}=\sqrt{\frac{25T}{T}}=5\] \[\therefore \,\,\,\,\,\,\,\,\,\,\,\,\,\,f'=5f\]


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