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If T is the surface tension of soap solu...

If T is the surface tension of soap solution, the amount of work done in blowing a soap bubble from a diameter D to 2D is

A

`6pi D^2 T`

B

`6pi DT^2`

C

`4pi D^2 T`

D

`4pi DT^2`

Text Solution

Verified by Experts

The correct Answer is:
A
Work done = T x change in area
` = T. 4pi (D^2 - (D^2)/(4)) = 3pi D^2 T`
As bubble has two surfaces, so
` therefore `Work done in blowing bubble `= 6pi D^2T`
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