A current of 200mA flows through a 4kΩ resistor. What is the potential difference across the resistor?

Given,

Current, I = 200mA = 0.2A

Resistance, R = 4kΩ = 4 × 103 Ohm = 4000 Ohm We know that,

V = IR

V = 0.2 × 4000

V = 800 volt