NEET Physics Surface Tension Assertion Reason Question
Assertion (A): The work done in stretching a liquid film is directly proportional to the increase in surface area.
Reason (R): The surface tension of the liquid film is equal to the force applied per unit length of the film.
Both A and R are true, and R is the correct explanation of A.
Both A and R are true, but R is not the correct explanation of A.
A is true, but R is false.
A is false.
Correct Answer
Detailed Explanation
The NCERT context explains that the work done is stored as additional energy in the film, which is directly proportional to the increase in surface area. The surface tension is defined as the force per unit length, explaining the work done against internal forces.
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