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JEE Main & Advanced Sample Paper JEE Main Sample Paper-25

  • question_answer
    Two capillaries of same material but of different radii are dipped in a liquid. In one of the capillary the liquid rises to a height of 22 cm and in other to 66 cm The ratio of their radii is :

    A)  \[9:1\]                          

    B)  \[1:9\]

    C)  \[3:1\]                          

    D)  \[1:3\]

    Correct Answer: C

    Solution :

    For capillary rise \[h=\frac{2T\cos \theta }{r\rho g}\] \[\frac{{{h}_{1}}}{{{h}_{2}}}=\frac{{{r}_{2}}}{{{r}_{1}}}=\frac{66}{22}\,=\frac{3}{1}\]


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