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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 positionD. Either (a) or (b) depensing on the size of `A` w.r.t. `B` |
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Answer» Correct Answer - A Because film tries to cover minimum surface area. |
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