JEE Main 2026 — Electrostatics Question with Solution
JEE Main 2026 (22 January Shift 2)
Question
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 :
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
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:
Initial potential on each:
When three bubbles coalesce,
Total charge and new radius from volume:
So
Final potential:
Ratio:
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This is a previous-year question from JEE Main 2026, covering the Electrostatics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.