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NEET Sample Paper NEET Sample Test Paper-89

  • question_answer
    A capillary tube is immersed vertically in water and the height of the water column is x. When this arrangement is taken into a mine of depth d, the height of the water column is y. If R is the radius of earth, the ratio \[\frac{x}{y}\] is:

    A) \[\left( 1-\frac{d}{R} \right)\]       

    B)        \[\left( 1-\frac{2d}{R} \right)\]

    C) \[\left( \frac{R-d}{R+d} \right)\]  

    D)        \[\left( \frac{R+d}{R-d} \right)\]

    Correct Answer: A

    Solution :

    [a] Acceleration due to gravity changes with the depth, \[g'=g\left( 1-\frac{d}{R} \right)\] Pressure, P \[\rho gh\] Hence ratio, \[\frac{x}{y}\] is \[\left( 1-\frac{d}{R} \right)\]


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