Properties Of Solids And Liquids Question 364
Question: A liquid film is formed in a loop of area 0.05 m2. Increase in its potential energy will be (T = 0.2 N/m) [RPMT 2002]
Options:
A) $ 5\times {{10}^{-2}}J $
B)$ 2\times {{10}^{-2}}J $
C) $ 3\times {{10}^{-2}}J $
D)None of these
Show Answer
Answer:
Correct Answer: B
Solution:
Increment in Potential energy = $ T\times \Delta A $
$ =0.02\times 2\times 0.05=2\times {{10}^{-2}}J $
