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The surface tension of a liquid is 0.5 ...

The surface tension of a liquid is 0.5 N/m . If a liquid film is formed on a ring of area 0.02 `m^(2)` then its surface energy will be

A

`0.01 ` J

B

`0.02 `J

C

` 0.03`J

D

`0.04` J

Text Solution

Verified by Experts

The correct Answer is:
B
`E= T xx 2A =0.5xx2 xx0.02 = 0.02` J
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