Question

A frame thread is tied slightly loose to a wire frame as in figure and the frame is dipped into a soap solution and taken out. The frame is completely covered with the film.When the portion A is punctured with a pin, the thread:

• A. becomes concave towards $A$
• B. becomes convex towards $A$
• C. either (a) or (b) depending on the size of $A$ with respect to $B$
• D. remains in the initial position

Answer 1

The correct option is A becomes concave towards $A$

Nature of a liquid surface is always to cover minimum surface area which will result in concave surface towards A.