Figure shows a capillary tube `C` dipped in a liquid that wets it. The liquid rises to a point `A`. If we blow air through the horizontal tube `H`, what will happen to the liquid column in the capillary tube?

Options

A. level will rise above A
B. level will fall below A
C. level will remain at A
D. remain at the same level

Answer

A

Explanation

Level will rise because to compensate for the reduction in pressure above A, due to high velocity (from Bernoulli's principle pressure decreases if velocity increases.)