If the surface tension of a soap solution is 0.03 MKS units, then the excess of pressure inside a soap bubble of diameter 6 mm over the atmospheric pressure will be

Less than 40 N/m²

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Greater than 40 N/m²

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Less than 20 N/m²

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Greater than 20 N/m²

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Solution

The correct option is B
Greater than 40 N/m²

$△ P = \frac{4 T}{r} = 40 N / m^{2}$

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