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# as a bubble comes from the bottom of a lake to the top, its radius

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## Assertion: A bubble comes from the bottom of a lake to the top. Reason: Its radius increases.

AIIMS 2008: Assertion: A bubble comes from the bottom of a lake to the top. Reason: Its radius increases. (A) If both Assertion and Reason are true an

## Q. Assertion: A bubble comes from the bottom of a lake to the top. Reason: Its radius increases.

1981  58 AIIMSAIIMS 2008

Since, the fluid move from higher pressure to lower pressure and in a fluid, the pressure increase with increase of depth. Hence, the pressure p

will be lesser at the top than that at the bottom ( p

0 ​

+hρg ). So, the air bubble moves from the bottom to the top and does not move sideways, since the pressure is same at the same level. Further in coming from bottom to top the pressure decreases. According to Boyle's law pV= constant.

Therefore, if pressure decreases the volume increases, it means radius increases.

## Assertion: A bubble comes from the bottom of a lake to the top. Reason: Its radius increases.

Assertion: A bubble comes from the bottom of a lake to the top.

Question

A

B

C

D

E

## If reason is true but assertion is false.

Medium Open in App

Updated on : 2022-09-05

Solution Verified by Toppr

Correct option is B)

The pressure will be greater at the bottom than at the top. So the air bubble moves from the bottom to the top i.e., from higher to lower pressure. Further in coming from bottom to top, the pressure decreases and hence volume increases (By Boyle's law, PV= constant), thus radius also increases.

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## If both assertion and reason are true and reason is the correct explanation of assertion.

If the bubble moves from the bottom to the top (i.e. from a higher pressure to a lower pressure ), pressure on it decrease and its volume ( and hence radius ) increase.

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Assertion. A bubble comes from...

Assertion. A bubble comes from the bottom of a lake to the top.

Updated On: 27-06-2022

If both assertion and reason are true and reason is the correct explanation of assertion.

B

If both assertion and reason are true but reason is not the correct explanation of assertion.

C

If assertion is true and reason is false.

D

If both assertion and reason are false.

Solution

If the bubble moves from the bottom to the top (i.e. from a higher pressure to a lower pressure ), pressure on it decrease and its volume ( and hence radius ) increase.

Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.

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