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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
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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 an NPN transistor the collector current is 24 mA. If 80% of the electrons
- In which of the processes, does the internal energy of the system remain constant?
- A focal length of a lens is 10 cm. What is power of a lens in dioptre?
- In Raman effect, Stoke’s lines are spectral lines having
- A boy standing at top of a tower of 20 m height drops a stone
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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