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When a 12V battery is connected across a...

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.

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Here, V = 12 V, 1= 2.5 mA ` = 2.5 xx 10^(-3) A, R = ?`
The resistance of the resistor `R = V/I`
`= 12/(2.5 xx 10^(-3))`
`= 4800 Omega`
`= 4.8 k Omega`
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