| ⇦ | 
| ⇨ |
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: - Which one of the following statements is not correct in case of a semiconductor?
- In a common emitter (CE) amplifier having a voltage gain G, the transistor
- Two bulbs 40 watt and 60 watt and rated voltage 240 V are connected in series
- A road of width 20 m forms an arc of radius 15 m,its outer edge is 2m higher than
- Electromagnets are made of soft iron because soft iron has
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Which one of the following statements is not correct in case of a semiconductor?
- In a common emitter (CE) amplifier having a voltage gain G, the transistor
- Two bulbs 40 watt and 60 watt and rated voltage 240 V are connected in series
- A road of width 20 m forms an arc of radius 15 m,its outer edge is 2m higher than
- Electromagnets are made of soft iron because soft iron has
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