Question

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.

Answer 1

Voltage V = 12 V

current flowing in the circuit I = 2.5 mA = 2.5 × 10⁻³ A

∴ Resistance (R) = `"V"/"I"`

= `12/(2.5 xx 10^-3)`

R = `(12 xx 10^3)/25`

R = 4800 Ω

R = `4800/1000` KΩ

R = 4.8 KΩ