Physics · 2021
JEE Main · 17 March 2021, Shift 1 · Q9
When two soap bubbles of radii a and b(b>a) coalesce, the radius of curvature of common surface is:
When two soap bubbles of radii $\displaystyle a$ and $\displaystyle b(b>a)$ coalesce, the radius of curvature of common surface is :
Official answer
(1)
$\displaystyle \frac{a b}{b-a}$
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JEE Main 2021 Physics question, with the answer from NTA’s final answer key. Where our answers come from.