2. Solved Papers
  3. CET Karnataka Medical

CET Karnataka Medical CET - Karnataka Medical Solved Paper-2002

  • question_answer
    A light points fixed to one prong of a tuning fork touches a vertical plate. The fork is set vibrating and the plate is allowed to fall freely. If eight oscillations are counted when the plate falls through 10 cm, the frequency of the tuning fork is:

    A)  280 Hz

    B)  360 Hz

    C)  56 Hz

    D)  560 Hz

    Correct Answer: C

    Solution :

    \[f=\frac{n}{T}=\frac{8}{T}\]velocity attain by plate to fall 10 cm. \[\upsilon =\sqrt{2gh}\] \[=\sqrt{2\times 10\times 0.1}\] \[=\sqrt{2}cm/\sec .\] Time taken to reach 10 cm. \[\upsilon =u+gt\] \[\sqrt{2}=10t\Rightarrow t=\frac{\sqrt{2}}{10}\sec \] \[f=\frac{8\times 10}{\sqrt{2}}=56.73Hz.\]


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