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The surface tension of a liquid is 5 Newton per meter. If a fi

Question

The surface tension of a liquid is $5$ Newton per meter. If a film of this liquid is held on a ring of $0.02$ $m e t er s^{2}$ . Its surface energy is about

5 J

2 J

0.2 J

3 J

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Elizabeth Discussed

The surface tension of a liquid is

5

Newton per meter. If a film of this liquid is held on a ring of

0.02

m e t er s^{2}

. Its surface energy is about

10 mins ago

Discuss this question LIVE

10 mins ago

Text solutionVerified

Given

-

T = 5 N / m

A = 0.02 m^{2}

As soap film will be formed at both sides of ring

,

Area

= 2 A

Surface energy is calculated by

-

Surface energy

=

Surface tension

\times

area

E = T \times 2 A

E = 5 \times 2 \times 0.02

E = 0.2 J

Surface energy is therefore

0.2 J .

Hence,

option

(C)

is correct answer.

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Question Text	The surface tension of a liquid is $5$ Newton per meter. If a film of this liquid is held on a ring of $0.02$ $m e t er s^{2}$ . Its surface energy is about
Answer Type	Text solution:1
Upvotes	150