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If ' $\mathrm{T}^{\prime}$ is the surface tension of a soap solution, then the work done in blowing a soap
bubble from diameter 'D' to diameter '2D' is
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bubble from diameter 'D' to diameter '2D' is
Solution:
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Verified Answer
The correct answer is:
$6 \pi \mathrm{TD}^{2}$
$W=\frac{4 \pi}{4}\left(4 D^{2}-D^{2}\right) T \times 2$
$=3 \mathrm{D}^{2} \pi \mathrm{T} \times 2=6 \mathrm{D}^{2} \pi \mathrm{T}$
$=3 \mathrm{D}^{2} \pi \mathrm{T} \times 2=6 \mathrm{D}^{2} \pi \mathrm{T}$
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