Properties Of Solids And Liquids Question 345

Question: The surface tension of liquid is 0.5 N/m. If a film is held on a ring of area 0.02 m2, its surface energy is [CPMT 1977]

Options:

A) 5×102joule

B)2.0×102joule

C) 4×104joule

D)0.8×101joule

Show Answer

Answer:

Correct Answer: B

Solution:

Surface energy = T×ΔA=0.5×2×(0.02) = 2×102J



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