| ⇦ | 
| ⇨ |
The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap bubble of surface area 40 cm², in joules is
Options
(a) 1.2×10⁻⁴
(b) 2.4×10⁻⁴
(c) 12×10⁻⁴
(d) 24×10⁻⁴
Correct Answer:
2.4×10⁻⁴
Explanation:
Given: Surface tension of a soap solution,
T = 0.03 N/m
Surface area, A = 40 cm² = 40 x 10⁻⁴ m²
Since the soap has two surfaces,
.·. Work done, W = T x 24
= 0.03 x 2 40 x 10⁻⁴ = 2.4 x 10⁻⁴J
Related Questions: - For the normal eye, the cornea of eye provides a converging power of 40D
- An oscillator circuit consists of an inductance of 0. mH and a capacitor of 20 μF.
- A hemispherical bowl of radius R is rotating about its axis of symmetry
- A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle
- In an NPN transistor the collector current is 24 mA. If 80% of the electrons
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- For the normal eye, the cornea of eye provides a converging power of 40D
- An oscillator circuit consists of an inductance of 0. mH and a capacitor of 20 μF.
- A hemispherical bowl of radius R is rotating about its axis of symmetry
- A 0.5 kg ball moving with a speed of 12 m/s strikes a hard wall at an angle
- In an NPN transistor the collector current is 24 mA. If 80% of the electrons
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