Question

If two soap bubbles of different radii are connected by a tube

(a) Air flows from the ** bubble to the smaller bubble till the sizes become equal

(b) Air flows from ** bubble to the smaller bubble till the sizes are interchanged

(c) Air flows from the smaller bubble to the **

(d) There is no flow of air

Answer 1

Correct Option (c) Air flows from the smaller bubble to the bigger

Explanation:

The excess pressure inside the soap bubble is inversely proportional to radius of soap bubble l.e. , p ∝ 1/r,r being the radius of bubble, It follows that pressure inside a smaller bubble is greater than that inside a ** bubble.

Thus, if these two bubbles are connected by a tube, air will flow from smaller bubble to ** bubble and the ** bubble grows at the expense of the smaller one.