# Q.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.

Given : V=12V  , I = 2.5 mA = 0.0025 A

$R=\frac{12}{0.0025}=4800\Omega =4.8k\Omega$

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