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Question 8

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.


Resistance (R) of a resistor is given by Ohm’s law as,


Potential difference, V = 12 V

Current in the circuit, I = 2.5 mA = 2.5x10-3 A

Therefore, the resistance of the resistor is 4.8 kΩ.

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