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The ratio of radii of two bubbles is `2 : 1`. What is the ratio of excess pressures inside them ?A. `1 : 2`B. `1 : 4`C. `2 : 1`D. `4 : 1` |
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Answer» Correct Answer - A The excess pressure inside the bubble `p=(4T)/(r). "then" p_(1=(4T))/(r_(1))....(i)` `p_(2)=(4T)/(r_(2))....(ii)` From Eqs. (i) and (ii), we get `(p_(1))/(p_(2))=(4T//r_(1))/(4T//r_(2))=(r_(2))/(r_(1))=(1)/(2)` |
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