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MHT CET 2020 (16 Oct, Shift 2) · Surface Energy & Work Done

Surface Energy & Work Done question from MHT CET 2020 (16 Oct, Shift 2)

Q28MHT CET 2020 · 16 OCT · SHIFT 2Medium

Surface Energy & Work Done

The work done in blowing a soap bubble of radius RR is WW. The work done in blowing a bubble of radius 2R2R of the same soap is

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Answer: (c)

  1. W=8πR2T∝R2W = 8\pi R^2 T \propto R^2 for the same soap.
  2. W′=(2)2W=4WW' = (2)^2 W = 4W
  3. So the answer is (c) 4W4W.
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