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 $
