Properties Of Solids And Liquids Question 342

Question: The surface tension of a soap solution is$ 2\times {{10}^{-2}}N/m. $ To blow a bubble of radius 1 cm, the work done is[MP PMT 1989]

Options:

A) $ 4\pi \times {{10}^{-6}}J $

B) $ 8\pi \times {{10}^{-6}}J $

C) $ 12\pi \times {{10}^{-6}}J $

D)$ 16\pi \times {{10}^{-6}}J $

Show Answer

Answer:

Correct Answer: D

Solution:

$ W=8\pi R^{2}T=8\times \pi \times {{({{10}^{-2}})}^{2}}\times 2\times {{10}^{-2}} $

$ =16\pi \times {{10}^{-6}}J $



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