When a \( 12 \mathrm{~V} \) battery is connected across an unknown resistor, there is a current ...

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When a \( 12 \mathrm{~V} \) battery is connected across an unknown resistor, there is a current of \( 2.5 \mathrm{~mA} \) in the circuit. Find the value of the resistance of the resistor.
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