Home Physics Fluid Mechanics All Topic Question for Revision Test When a capillary tube is dipped into water, …
Physics Fluid Mechanics All Topic Question for Revision Test MCQ (Single Correct)

When a capillary tube is dipped into water, water rises upto 10 cm in the tube. What happens when the tube is pushed down such that its end is only 7 cm above outside water level?

A
The radius of the meniscus increases and therefore water does not overflow.
B
The radius of the water meniscus decreases and therefore does not overflow.
C
The water forms a droplet on top of the tube but does not overflow.
D
The water starts overflowing.

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Text Solution

Verified by Experts
The correct answer is:
A

or

or or constant
If h decreases, the radius of curvature of the meniscus increases.

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