A thread is tied slightly loose to a wire frame as shown in the 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:
Text Solution
Verified by ExpertsThe correct answer is:
B
After the portion A is punctured’ the thread has 2 options as shown in the figures.
or 
Clearly, due to surface tension, the soap film wants to minimize the surface area which is happening in
option (ii). Hence the thread will become concave towards A.
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