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Mechanical Properties of Fluids

Excess pressure

Assertion :A large soap bubble expands while a small bubble sh

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Solving time: 2 mins

Assertion :A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube.
Reason :The excess pressure inside bubble (or drop) is inversely proportional to the radius.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Assertion is correct but Reason is incorrect

Both Assertion and Reason are incorrect

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Assertion :A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube.
Reason :The excess pressure inside bubble (or drop) is inversely proportional to the radius.

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Text solutionVerified

Since the excess pressure due to surface tension is inversely proportional to its radius, it follows that smaller the bubble, greater is the excess pressure. Thus, when the larger and the smaller bubbles are put in communication, air starts passing from the smaller into the large bubble because excess pressure inside the former is greater than inside the latter. As a result, the smaller bubble shrinks and the larger one swells.

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Question Text	Assertion :A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube. Reason :The excess pressure inside bubble (or drop) is inversely proportional to the radius.
Topic	Mechanical Properties of Fluids
Subject	Physics
Class	Class 11
Answer Type	Text solution:1
Upvotes	76

Assertion :A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube.
Reason :The excess pressure inside bubble (or drop) is inversely proportional to the radius.

Text solutionVerified

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Assertion :A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube. Reason :The excess pressure inside bubble (or drop) is inversely proportional to the radius.

Text solutionVerified

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Assertion :A large soap bubble expands while a small bubble shrinks, when they are connected to each other by a capillary tube.
Reason :The excess pressure inside bubble (or drop) is inversely proportional to the radius.