CBSE 2024 · Region 5 · Set 1 · Q1 · 1 mark
A battery supplies $\displaystyle 0.9$ A current through a $\displaystyle 2 \Omega$ resistor and $\displaystyle 0.3$ A current through a $\displaystyle 7 \Omega$ resistor when connected one by one. The internal resistance of the battery is :
Official answer
From CBSE’s own marking scheme for this paper.
(D)
$\displaystyle 0.5 \Omega$
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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.