Properties Of Solids And Liquids Question 321

Question: A spherical drop of water has radius 1 mm If surface tension of water is $ 70\times {{10}^{-3}} $ N/mdifference of pressures between inside and out side of the spherical drop is [CPMT 2000; AIIMS 2000]

Options:

A) $ 35N/{{m}^{-2}} $

B)$ 70N/m^{2} $

C) $ 140N/m^{2} $

D)Zero

Show Answer

Answer:

Correct Answer: C

Solution:

$ \Delta P=\frac{2T}{R}=\frac{2\times 70\times {{10}^{-3}}}{1\times {{10}^{-3}}}=140N/m^{2} $



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