A battery has e.m.f. \( 4 V \) and internal resistance \( r \) . Wh...

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A battery has e.m.f. \( 4 V \) and internal resistance \( r \) . When this battery is connected to an external resistance of \( 2 \mathrm{ohms} \), a current of \( 1 \mathrm{~A} \) flows in the circuit. What current will flow if the terminals of the battery are connected directly?
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