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JEE Main & Advanced Physics Wave Mechanics Question Bank Basics of Mechanical Waves

  • question_answer
    Velocity of sound measured in hydrogen and oxygen gas at a given temperature will be in the ratio [RPET 2001; UPSEAT 2001; KCET 2002, 05]

    A)            1 : 4                                          

    B)            4 : 1

    C)            2 : 1                                          

    D)            1 : 1

    Correct Answer: B

    Solution :

               \[v\propto \frac{1}{\sqrt{M}}\Rightarrow \frac{{{v}_{{{H}_{2}}}}}{{{v}_{{{O}_{2}}}}}=\sqrt{\frac{{{M}_{{{O}_{2}}}}}{{{M}_{{{H}_{2}}}}}}=\sqrt{\frac{32}{2}}\Rightarrow \frac{{{v}_{{{H}_{2}}}}}{{{v}_{{{O}_{2}}}}}=\frac{4}{1}\]


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