Capillarity and Venturimeter Statements – Rankers Physics
Topic: Solid and Fluids
Subtopic: Fluid Dynamics

Capillarity and Venturimeter Statements

Consider the following statements:
Statement A:  When a capillary tube is dipped into a liquid, if the liquid neither rises nor falls in the capillary, then the angle of contact must be zero.
Statement B: The working of a Venturi-meter is based on Bernoulli's theorem.
Based upon the above information, pick the correct option:
Both statement (A) and (B) are correct
Both statement (A) and (B) are incorrect
Statement (A) is correct while statement (B) is incorrect
Statement (A) is incorrect while statement (B) is correct

Solution:

If liquid neither rises nor falls, the net vertical surface tension force is zero, meaning the contact angle is \(90^\circ\). Venturi-meter works on Bernoulli's theorem, so only statement B is correct.

Leave a Reply

Your email address will not be published. Required fields are marked *