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NEET 2023
Exam
NEET
Year
2023
Subject
Physics
Chapter
Mechanical Properties of Fluids

NEET 2023 · Physics · Mechanical Properties of Fluids

The amount of energy required to form a soap bubble of radius 2cm...

The amount of energy required to form a soap bubble of radius 2cm2cm from a soap solution is nearly: (surface tension of soap solution = 0.03Nm−10 . 03N{m}^{- 1})

Options

  1. A50.1×10−4J50 . 1 \times {10}^{- 4}J
  2. B30.16×10−4J30 . 16 \times {10}^{- 4}J
  3. C5.06×10−4J5 . 06 \times {10}^{- 4}J
  4. D3.01×10−4J3 . 01 \times {10}^{- 4}J

Correct answer

D. 3.01×10−4J3 . 01 \times {10}^{- 4}J

Step-by-step solution

Soap bubble has two free surface.

Therefore, amount of energy required =2[S×A]=2[0.03×(4π(2×10−2)2)]=3.01×10−4J= 2\left[S \times A\right] = 2\left[0 . 03 \times \left(4\pi{\left(2 \times {10}^{- 2}\right)}^{2}\right)\right] = 3 . 01 \times {10}^{- 4}J

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