In air, 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
A
B
C
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Text Solution
Verified by ExpertsThe correct answer is:
C
A soap bubble of radius ' R ' breaks into 27 small soap bubbles of equal radius ' r '.
Volume of big soap bubble 
Volume of smaller soap bubbles
Now, mechanical force acting per unit area on bigger soap bubble, 
and for one small soap bubble, 
Required ratio, 
or 
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