Question

A soap bubble is blown with the help of a mechanical pump at the mouth-of a tube the pump produces a certain increase per min 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

Answer 1

Correct option: (A)

Explanation:

P = (4T / R) i.e. pressure inside soap bubble P ∝ (1/R)

With time t, radius of soap bubble with increase

i.e.      R ∝ t

Hence P ∝ (1/R) means P ∝ (1/t)

Hence P, t follows inverse relation hence graph is option A