Assertion :A partly filled test tube is floating in a liquid as shown. The bottom pressure of tube will remain as it is if atmospheric pressure changes. Reason: The buoyant force on a submerged object is independent of atmospheric pressure

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

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

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is D Assertion is incorrect but Reason is correct
Since pressure at the bottom of the tube is calculated as :
$P_{b o t t o m} = P_{a t m} + ρ g h$
therefore , tube will not remain as it is if atmospheric pressure changes.
Also, buoyant force $F_{b} = V ρ g$
Thus, The buoyant force on a submerged object is independent of atmospheric pressure.

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