A soap bubble is blown with the help of ...

A soap bubble is blown with the help of mechanical pump at the mouth of a tube. The pump produces a cartain increase per minute in the volume of the bubble, irrespective of its internal pressure. The graph between the pressure inside the soap bubble and time `t` will be

A

B

C

D

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The correct Answer is:

A

`DeltaP prop 1/r` as `r uarr t uarr :. DeltaP prop 1/t`

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