Properties Of Solids And Liquids Question 335
Question: If T is the surface tension of soap solution, the amount of work done in blowing a soap bubble from a diameter D to 2D is[MP PMT 1990]
Options:
A) 2$ \pi D^{2}T $
B)4$ \pi D^{2}T $
C) 6$ \pi D^{2}T $
D)8$ \pi D^{2}T $
Show Answer
Answer:
Correct Answer: C
Solution:
Work done to increase the diameter of bubble from d to D $ W=2\pi (D^{2}-d^{2})T=2\pi [{{(2D)}^{2}}-{{(D)}^{2}}]\ T=6\pi D^{2}T $
