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

Options

A.
B.
C.
D.

Answer

A

Explanation

`Deltap=(4T)/(r ) implies Deltap prop (1)/(r )`
As radius of soap bubble increases with time.
`therefore " " Delta p prop(1)/(t)`