Question

The size of an air bubble rising up In water

• A. Increases
• B. Decreases
• C. Remains Constant
• D. May increase or decrease

Answer 1

The correct option is A

Increases

Explanation:

1. The pressure exerted by water is exactly proportional to its depth, the pressure in a water body increases linearly as the depth of water increases.
2. As a result, as an air bubble rises in water, the pressure acting on it reduces.
3. The volume occupied by a gas is inversely proportional to the pressure acting on it, i.e., if the pressure increases, the volume occupied by the gas decreases, and if the pressure acting on the gas reduces, the volume occupied by the gas increases.
4. Hence the size of a rising air bubble grows as the pressure decreases.

Hence, the correct option is (a) increases.