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

Here I = 2.5 mA = 2.5 × 10^-3 A.

∴ R = \(\frac{12}{25\times 10^{-3}}\)

= 4.8 × 10³Ω

= 4.8 K cal.