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  • if a soap bubble expands, the pressure inside the bubble:  Option: 1  increasesOp

if a soap bubble expands, the pressure inside the bubble:
 

Option: 1

 increases


Option: 2


remains the same
 


Option: 3

is equal to the atmospheric pressure
 


Option: 4

decreases


Answers (1)

Inside the soap bubble,

excess pressure is \Delta P=\frac{4 T}{R}
\begin{gathered} \Delta P=P_{\text {inside }}-P_{\text {outside }}=\frac{4 T}{R} \\ \because P_\text { outside }=P_\text { atmospheric }=\text { constant } \end{gathered}

With the increase in radius as the bubble expands Pinside decrease
The correct option is (4)

Posted by

Kshitij

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