When a film of soap solution is created inside a loop formed by a rectangular wire frame and an inextensible light thread AB of length l, the thread assumes shape of a semi-circle and remains equilibrium. By pulling the midpoint of thread with a force F, the thread can be given shape of two semicircles as shown in figure. Calculate surface tension $σ$ of the soap solution.

\frac{π F}{l}

\frac{π F}{2 l}

\frac{π F}{4 l}

None

Views: 2,061 students

Found 7 tutors discussing this question

Harper Discussed

When a film of soap solution is created inside a loop formed by a rectangular wire frame and an inextensible light thread AB of length l, the thread assumes shape of a semi-circle and remains equilibrium. By pulling the midpoint of thread with a force F, the thread can be given shape of two semicircles as shown in figure. Calculate surface tension $σ$ of the soap solution.

11 mins ago

Discuss this question LIVE

11 mins ago