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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
- An electron having charge e and mass m is moving in a uniform electric field E.
- In p- type semiconductor, the acceptor level lies
- In a Rutherford scattering experiment when a projectile of charge Z₁ and mass M₁
- A tyre filled with air (27° C and 2 atm) bursts. The temperature of air is (ˠ=1.5)
- The kirchoff’s first law (∑i=0) and second law (∑iR=∑E), where the symbols
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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