When a `12 V` battery is connected across an unknown resistor, there is a current of `2.5 mA` in the circuit. Find the value of the resistance of the resistor.

Explanation

To find the value of the resistance of the unknown resistor when a `12 V` battery is connected across it and a current of `2.5 mA` flows through the circuit, we can use Ohm's Law. Ohm's Law states that:

\[ V = I \times R \]

Where:
- \( V \) is the voltage (in volts),
- \( I \) is the current (in amperes),
- \( R \) is the resistance (in ohms).
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