Liquid drops are falling slowly one by one from a vertical glass tube. Establish a relation between the weight of a drop w, the surface tension land the radius r of the tube (assume the angle of contact to be zero)

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

W=πr2T

W=2πrT

w=2πr2T

W=43πr3T

answer is B.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

The upward force due to surface tension is given by F=(2πr)Tcos⁡θ Here θ=0, i.e., cos⁡θ=1 ∴ F=2πrT or W=2πrT

Watch 3-min video & get full concept clarity