Three small identical bubbles of water having same charge on each coalesce to form a bigger bubble. Then the ratio of the potentials on one initial bubble and that on the resultant bigger bubble is :
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
For three identical conducting bubbles with charge 
and radius 
,
Initial potential on each: 
When three bubbles coalesce,
Total charge 
and new radius from volume: 
So 
Final potential: 
Ratio: 
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