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A thread is tied slightly loose to a wir...


A 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 comletely covered with the film. When the portion `A` puntured with a pin The thread.

A

becomes concave towards A

B

becomes convex towards A

C

remains in the initial position

D

either (a) or (b) depending on the size of A w.r. t. B

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