Aiims exam question

Two soap bubbles have radii in the ratio 2 : 1. What is the ratio of excess pressure inside them?


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2 Respuestas
  • 1:2
    0


  • Excess pressure inside a bubble of radius R and surface tension T is given by $P_e\:=\:\frac{4T}{R}$.
    Therefore excess pressure is inversely proportional to the radius.
    So $\frac{P_1}{P_2}\:=\:\frac{R_2}{R_1}\:=\:\frac{1}{2}$.
    So the ratio of excess pressure inside them will be 1:2.