The work done in increasing the size of a rectangular soap film with dimensions 8 cm × 3.75 cm to 10 cm × 6 cm is 2 × 10 –4 J. The surface tension of the film liquid in N/m is:
Text Solution
Verified by ExpertsThe correct answer is:
B
W = T Δ A
2 × 10 –4 = (60 – 30) × 10 –4 T × 2
T = 
= 
= 3.3 × 10 –2 N/m
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The value of surface tension of a liquid at critical temperature is
The spherical shape of rain-drop is due to
Surface tension is due to
When there is no external force, the shape of a liquid drop is determined
Soap helps in cleaning clothes, because
A pin or a needle floats on the surface of water, the reason for this is