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Question

Two soap bubbles have different radii but their surface tension is the same. Mark the correct statement


A
Internal pressure of the smaller bubble is higher than the internal pressure of the larger bubble
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B
Pressure of the larger bubble is higher than the smaller bubble
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C
Both bubbles have the same internal pressure
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D
None of the above
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Solution

The correct option is B Internal pressure of the smaller bubble is higher than the internal pressure of the larger bubble
$$\Delta P=\dfrac{4T}{R}\therefore \Delta P\propto \dfrac{1}{R}$$    ($$T$$ = constant)
Hence, the internal pressure of smaller bubble is larger than that of larger bubble.

Physics

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