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Electrostatics

JEE Main level, single correct, medium

39 of 311

Question 39 of 311

Two isolated conducting spheres ${S}_{1}$ and ${S}_{2}$ of radius $\dfrac{2}{3}R$ and $\dfrac{1}{3}R$ have $12\mu C$ and $-3\mu C$ charges, respectively, and are at a large distance from each other, They are now connected by a conducting wire. A long time after this is done the charges on ${S}_{1}$ and ${S}_{2}$ are respectively:

Show answer and solution

Answer: (D) $6\mu Cand3\mu C$

Total charge

=12-3=9\mu C

If final charges are

{q}_{1}

and

{q}_{2}

\dfrac{{q}_{1}}{{q}_{2}}=\dfrac{{R}_{1}}{{R}_{2}}=\dfrac{2}{1}

{q}_{1}=6\mu C

{q}_{2}=3\mu C

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JEE Main 2025 Apr 2 Shift 1 question paper

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