| ⇦ | 
| ⇨ |
The surface tension of a liquid is 5 newton per metre. If a film is held on a ring of area 0.02 metre², its surface energy is about
Options
(a) 5×10⁻² J
(b) 2.5×10⁻² J
(c) 2×10⁻¹ J
(d) 3×10⁻¹ J
Correct Answer:
2×10⁻¹ J
Explanation:
Surface tension = Surface energy/Surface Area
Since the film has two surface
.·. Surface energy = (5 Nm⁻¹) (2 x 0.02 m²) = 2 x 10⁻¹ J.
Related Questions: - A capacitor is used to store 24 watt hour of energy at 1200 volt.
- Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV.
- The electric field in a certain region is acting radially outward and is given by E=Ar.
- A circular coil of radius 10cm and 100 turns carries a current 1 A.
- The escape velocity of a body from earth’s surface is Ve. The escape velocity
Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A capacitor is used to store 24 watt hour of energy at 1200 volt.
- Photons of energy 6 eV are incident on a metal surface whose work function is 4 eV.
- The electric field in a certain region is acting radially outward and is given by E=Ar.
- A circular coil of radius 10cm and 100 turns carries a current 1 A.
- The escape velocity of a body from earth’s surface is Ve. The escape velocity
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