TS EAMCET · Physics · Work Power Energy
If the work done in blowing a soap bubble of radius \(\mathrm{K}\) is W, then the work done in blowing the soap bubble of radius \(2 R\) is
- A \(6 \mathrm{~W}\)
- B \(12 \mathrm{~W}\)
- C \(4 \mathrm{~W}\)
- D \(2 \mathrm{~W}\)
Answer & Solution
Correct Answer
(C) \(4 \mathrm{~W}\)
Step-by-step Solution
Detailed explanation
Work done is given by: \[ \mathrm{W}=\mathrm{T} \cdot \mathrm{A} \] Area of spherical bubble is \(4 \pi R^2\) \[ \text { i.e., } \mathrm{W}=\mathrm{T} \times 4 \pi \mathrm{R}^2 \text {. } \] \[ \mathrm{W} \propto \mathrm{R}^2 \] For Radius R, Workdone \(=\mathrm{W}\) For Radius…
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