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The work done in blowing a soap bubble o...

The work done in blowing a soap bubble of 10 cm radius is (Surface tension of the soap solution is `3/100` N/m)

A

`37.68 xx 10^(-4)J`

B

`75.36 xx 10^(-4) J`

C

`75.36 J`

D

`150.72 xx 10^(-4) J`

Text Solution

Verified by Experts

The correct Answer is:
B
Work done, `W = SA = 4pi r^(2) xx S`
Since, soap bubble has two surfaces `= 2 xx 4 xx pi r^(2) xx S`
`= 2 xx 4 xx 3.14 xx 0.1 xx 0.1 xx (3)/(100)`
`= 75.36 xx 10^(-4) J`
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