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Surface tension

There is a horizontal film of soap solution. On it a thread is

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There is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is punctured inside the loop and the thread becomes a circular loop of radius R. If the surface tension of the soap solution be T then the tension in the thread will be

π R^{2} / T

π R^{2} T

2 π RT

2RT

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There is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is punctured inside the loop and the thread becomes a circular loop of radius R. If the surface tension of the soap solution be T then the tension in the thread will be

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Text solutionVerified

Let the surface tension be

F

in thread(

2 T Δ l)

for a small part

Δ l

Δ l = R θ

2 F sin \frac{θ}{2} = 2 T Δ l = 2 TR θ

F = \frac{TRθ}{s i n \frac{θ}{2}} = 2 RT

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Question Text	There is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is punctured inside the loop and the thread becomes a circular loop of radius R. If the surface tension of the soap solution be T then the tension in the thread will be
Topic	Mechanical Properties of Fluids
Subject	Physics
Class	Class 11
Answer Type	Text solution:1
Upvotes	90

There is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is punctured inside the loop and the thread becomes a circular loop of radius R. If the surface tension of the soap solution be T then the tension in the thread will be

Text solutionVerified

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There is a horizontal film of soap solution. On it a thread is placed in the form of a loop. The film is punctured inside the loop and the thread becomes a circular loop of radius R. If the surface tension of the soap solution be T then the tension in the thread will be

Text solutionVerified

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