JEE Advanced2018_S1 - Competishun – Live JEE & NEET Courses and Exam Prep

JEE Advance2018

Paper-1

Multiple correct answers - Select all that apply

Question

A uniform capillary tube of inner radius $r$ is dipped vertically into a beaker filled with water. The water rises to a height $h$ in the capillary tube above the water surface in the beaker. The surface tension of water is $\sigma$. The angle of contact between water and the wall of the capillary tube is $\theta$. Ignore the mass of water in the meniscus. Which of the following statements is (are) true?

Select ALL correct options:

For a given material of the capillary tube, h decreases with increase in $r$

For a given material of the capillary tube, h is independent of $\sigma$

If this experiment is performed in a lift going up with a constant acceleration, then $h$ decreases

$h$ is proportional to contact angle $\theta$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

⚠ Partially correct. Some answers are missing.

Solution