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

  • question_answer
    If vm is the velocity of sound in moist air, vd is the velocity of sound in dry  air, under identical conditions of pressure and temperature                                                      [KCET 2002, 03]

    A)            vm > vd                                    

    B)            vm < vd

    C)            vm = vd                                    

    D)            vmvd = 1

    Correct Answer: A

    Solution :

                The density of moist air (i.e. air mixed with water vapours) is less than the density of dry air                               Hence from \[v=\sqrt{\frac{\gamma P}{\rho }}\] Þ \[{{v}_{moist\,air}}>{{v}_{dry\,air}}\]


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