Q.
Water stands at level $A$ in the arrangement shown in the figure. What will happen if a jet of air is gently blown into the horizontal tube in the direction shown in the figure?
A) Water will rise above $A$ in the capillary tube
B) Water will fall below $A$ in the capillary tube
C) There will be no effect on the level of water in the capillary tube
D) Air will emerge from end $B$ in the form of bubbles
Explanation
(a) When air is blown in the horizontal tube, the pressure of air decreases in the tube. Due to which the water will rise above the tube $A$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.