AP EAMCET · PHYSICS · Mechanical Properties of Fluids
The surface tension of soap solution is \(0.03 \mathrm{~N} / \mathrm{m}\). The work done in blowing to form a soap bubble of surface area \(40 \mathrm{~cm}^2\), (in J), is
- A \(1.2 \times 10^{-4}\)
- B \(2.4 \times 10^{-4}\)
- C \(12 \times 10^{-4}\)
- D \(24 \times 10^{-4}\)
Answer & Solution
Correct Answer
(B) \(2.4 \times 10^{-4}\)
Step-by-step Solution
Detailed explanation
In case of soap bubble \[ \begin{aligned} W & =T \times 2 \times \Delta A \\ & =0.03 \times 2 \times 40 \times 10^{-4} \\ & =2.4 \times 10^{-4} \mathrm{~J} \end{aligned} \]
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