CBSE 2024 · Region 4 · Set 1 · Q2 · 1 mark
Two identical small conducting balls $\displaystyle \mathrm{B}_{1}$ and $\displaystyle \mathrm{B}_{2}$ are given -$\displaystyle 7$ pC and +$\displaystyle 4$ pC charges respectively. They are brought in contact with a third identical ball $\displaystyle \mathrm{B}_{3}$ and then separated. If the final charge on each ball is -$\displaystyle 2$ pC , the initial charge on $\displaystyle \mathrm{B}_{3}$ was
Official answer
From CBSE’s own marking scheme for this paper.
(B)
-$\displaystyle 3$ pC
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CBSE Class 12 Physics past-paper question from the 2024board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.