The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly (Surface tension of soap solutions = 0.03 N m^-1 ): - Physics MCQ NEET 2023 2026 | ExamTest.live

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The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly (Surface tension of soap solutions = 0.03 N m^{- 1}):

Solution & Step-by-step Explanation

A soap bubble has two surfaces (inner and outer).Work done W = T \times Δ A .Total surface area A = 2 \times (4 π r^{2}) = 8 π r^{2} .Given: r = 2 cm = 2 \times 1 0^{- 2} m T = 0.03 N/m $ W = 0.03 \times 8 \times 3.14 \times (2 \times 1 0^{- 2})^{2} $ W = 0.24 \times 3.14 \times 4 \times 1 0^{- 4} W = 3.0144 \times 1 0^{- 4} J

Try it yourself before checking the explanation above.

The amount of energy required to form a soap bubble of radius 2 cm from a soap solution is nearly (Surface tension of soap solutions = 0.03 N m^{- 1}):

30.16 \times 1 0^{- 4} J

5.06 \times 1 0^{- 4} J

3.01 \times 1 0^{- 4} J

50.1 \times 1 0^{- 4} J

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