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9th Class Science Sound Question Bank Sound Conceptive Objective Problems

  • question_answer
    Two wave of the same pitch have amplitude in the ratio 1 : 2. What will be the ratio of their loudness?

    A)  1 : 4                      

    B)  1 : 3

    C)  1 : 6                                      

    D)  1 : 2

    Correct Answer: A

    Solution :

      We know that loudness \[\propto {{(amplitude)}^{2}}\] \[loudness\propto {{\left( \frac{1}{2} \right)}^{2}}\propto \frac{1}{4}\]\[\therefore \]loudness ratio is 1 : 4              


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