NEET Physics Mechanical Properties of Fluids Questions Solved


The surface tension of a liquid is 5 N/m. If a thin film of the area 0.02 m2 is formed on a loop, then its surface energy will be

(a) 5×102 J              (b) 2.5×10-2 J

(c) 2×10-1 J            (d) 5×10-1 J

(c) W=T×A=5×2×(0.02)  (Film has two free surfaces)

2×10-1 J

Difficulty Level:

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