2. Questions Bank
  3. 9th Class
  4. Science
  5. Sound

9th Class Science Sound Question Bank Sound Conceptive Objective Problems

  • question_answer
    Two sound waves in air have wavelength ratio 1 : 3. Then their frequency ratio will be

    A)  1 : 3                      

    B)  2 : 1    

    C)  3 : 1      

    D)  1 : 2

    Correct Answer: C

    Solution :

      We know, \[v=f\lambda \] \[\Rightarrow \]\[f=\frac{f}{\lambda }\]\[\Rightarrow \]\[f\propto \frac{1}{\lambda }\] As wave length ratio = 1 : 3 \[\therefore \]frequency ratio = 3 : 1     


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