MHT CET 2024 Physics question
Liquid drops are falling slowly one by one from vertical glass tube. The relation between the weight of a drop 'w' the surface tension 'T' and the radius 'r' of the tube is (Angle of contact is zero)
Answer: (D)
Solution
A drop hanging from the tube remains attached as long as the upward surface-tension force along the circumference of the tube (length ) balances its weight. Surface tension acts along the line of contact, tangentially, and for zero angle of contact it is vertical, so the upward force is . The
See the full step-by-step solution
Create a free account to read the complete working, and practise questions like this in a timed test.
Create a free account