Properties Of Solids And Liquids Question 363
Question: The work done in blowing a soap bubble of radius 0.2 m is (the surface tension of soap solution being 0.06 N/m)[Pb. PET 2002]
Options:
A) $ 192\pi \times {{10}^{-4}}J $
B)$ 280\pi \times {{10}^{-4}}J $
C) $ 200\pi \times {{10}^{-3}}J $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
$ W=8\pi r^{2}\times T=8\pi \times {{(0.2)}^{2}}\times 0.06=192\pi \times {{10}^{-4}}J $
