| ⇦ | 
| ⇨ |
A spherical liquid drop of radius R is divided into 8 equal droplets. If the surface tension is T, then work done in the process will be
Options
(a) 2πR²T
(b) 3πR²T
(c) 4πR²T
(d) 2πRT²
Correct Answer:
4πR²T
Explanation:
Given: Surface tension = T
Radius of liquid drop = R
Let r be the radius of each small droplet
.·. Volume of big drop = volume of small droplets
(4/3) πR³ = 8 x (4/3) πr²
or R = 2r or r = R/2 ——(i)
Surface area of big drop = 4πR²
Surface are of 8 small droplets = 8 x 4πr²
8 x 4π x (R/2)² = 2(4πR²)
Increase in surface area = 2(4πR²) – 4πR² = 4πR²
Work done = T x increase in surface area
= T x 4πR² = 4πR²T.
Related Questions: - Mass defect is known as
- The unit of surface tension is
- The number of photo electrons emitted for light of a frequency v
- The resistance of a bulb filament is 100 Ω at a temperature of 100⁰C.
- A planet moving along an elliptical orbit is closest to the sun at a distance of r₁
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Mass defect is known as
- The unit of surface tension is
- The number of photo electrons emitted for light of a frequency v
- The resistance of a bulb filament is 100 Ω at a temperature of 100⁰C.
- A planet moving along an elliptical orbit is closest to the sun at a distance of r₁
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply