When a resistance of \( 2 \mathrm{ohm} \)  is placed across a battery the current is \( 1 \...

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When a resistance of \( 2 \mathrm{ohm} \)  is placed across a battery the current is \( 1 \mathrm{~A} \) and when the resistance across the terminals is \( 17 \mathrm{ohm} \), the current is \( 0.25 \mathrm{~A} \). the \( emf \) of the battery is
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