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9.2 , surface tension — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics9.2 , surface tension1 Mark
MCQ
If a soap bubble expands, the pressure inside the bubble:
  • A
    increases
  • B
    remains the same
  • C
    is equal to the atmospheric pressure
  • ✓
    decreases
✓

Answer

Correct option: D.
decreases
d
$P=P_{0}+\frac{4 T}{R}$

$\Rightarrow R$ increases and $P$ decreases

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