In air, a charged soap bubble of radius ‘ R ’ breaks into 27 small soap bubbles of equal radius ‘ r ’. Then, the ratio of mechanical force acting per unit area of big soap bubble to that of a small soap bubble is

Question

In air, a charged soap bubble of radius ‘ R ’ breaks into 27 small soap bubbles of equal radius ‘ r ’. Then, the ratio of mechanical force acting per unit area of big soap bubble to that of a small soap bubble is, 1 81, 3 1, 1 3, 9 1

MARKS App · Accepted Answer

∵ R = n 1 3 . r R = 27 1 3 . r R = 3 r ∴ F A ∝ 1 r 2 F A B i g F A S m a l l = 1 3 r 2 1 r 2 = 1 9

Search any question & find its solution

Looking for more such questions to practice?