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Physics · 2025 · 2 marks
CBSE 2025 · Region 7 · Set 1 · Q17
A cell of emf E and internal resistance r is connected across a resistor of variable resistance R. Show graphically the variation of (a) the terminal…
A cell of emf $\displaystyle E$ and internal resistance $\displaystyle r$ is connected across a resistor of variable resistance $\displaystyle R$. Show graphically the variation of
(a)
the terminal voltage across the cell,
(b)
the current supplied by the cell, with $\displaystyle R$ as it is increased from $\displaystyle 0$ to the maximum value.
Marking-scheme solution
(a)
(b)
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CBSE Class 12 Physics past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.