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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.
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Topics: Properties of Bulk Matter
(130)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- In potentiometer experiment, a cell of emf 1.25V gives balancing length of 30 cm
- The radius of germanium nuclide is measured to be twice the radius of ₄⁹Be.
- A body of mass m is placed on the earth’s surface. It is taken from the earth’s surface
- A particle moves from position r₁ = 3i + 2j -6k to position r₂ = 14i + 13 j+ 9 k
- A boat of mass 40 kg is at rest.A dog of mass 4 kg moves in the boat
Topics: Properties of Bulk Matter (130)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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