A battery of emf \( \mathrm{E} \) and internal resistance \( r \) i...

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A battery of emf \( \mathrm{E} \) and internal resistance \( r \) is connected across a resistance \( R \). Resistance \( R \) can be adjusted to any value greater than or equal to zero. A graph is plotted between the current (i) passing through the resistance and potential difference (V) across it. Select the correct alternative(s) _____.
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