JEE Main 2026 — Mechanical Properties of Fluids Question with Solution
JEE Main 2026 (24 January Shift 2)
Question
A soap bubble of surface tension is blown to a diameter of 7 cm. If of work is done in blowing it further to make its diameter 14 cm, then the value of is . ()
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Show full solutionCorrect answer: 11304
Correct answer
11304
Step-by-step explanation
Soap bubble has two surfaces. Work done:
Initial radius: cm = 0.035 m, Final radius: cm = 0.07 m
Change in surface area (both surfaces):
m²
J = J = 3696 μJ
Therefore:
Initial radius: cm = 0.035 m, Final radius: cm = 0.07 m
Change in surface area (both surfaces):
m²
J = J = 3696 μJ
Therefore:
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