Question

When a 12V 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.

Answer 1

Given: $V=12V$

$I=2.5mA$

Let the resistance be $R$

By Ohm's Law,

$V=IR$

$12=2.5\times {10}^{-3}R$

$R=4.8\times {10}^3\Omega$