Physics - Current Electricity Question with Solution | TestHub

Two soap bubbles A and B are kept in a closed chamber where the air is maintained at pressure $8\mathrm{N}/{\mathrm{m}}^2$. The radii of bubbles $A$ and $B$ are 2 cm and 4 cm , respectively. Surface tension of the soap water used to make bubbles is $0.4\mathrm{N}/\mathrm{m}$. Find the ratio ${\mathrm{n}}_B/{\mathrm{n}}_A$, where ${\mathrm{n}}_A$ and ${\mathrm{n}}_B$ are the number of moles of air in bubbles A and B , respectively. (Neglect the effect of gravity)