J & K CET Medical J & K - CET Medical Solved Paper-2007

  • question_answer
    Two liquid drops have diameters of 1 cm and 1.5 cm. The ratio of excess of pressures inside them is

    A)  1 : 1                                      

    B)  5 : 3

    C)  2 : 3                                      

    D)  3 : 2

    Correct Answer: D

    Solution :

                     Excess pressure inside a liquid drop \[\Delta p=\frac{2T}{R}\]where T is surface tension and R is radius of liquid drop. \[\therefore \]\[\frac{\Delta {{p}_{1}}}{\Delta {{p}_{2}}}=\frac{{{R}_{2}}}{{{R}_{1}}}\]                 \[=\frac{0.75}{0.50}\] \[\Rightarrow \]\[\frac{\Delta {{p}_{1}}}{\Delta {{p}_{2}}}=\frac{3}{2}\]


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