Ohm's Law
Interactive simulation — adjust parameters and watch the visualization update in real time.
Live graphs
How it works
Ohm’s law: for many metallic conductors at constant temperature, current through a resistor is proportional to the voltage across it, I = V/R. The V–I curve is a straight line through the origin; its slope is the conductance 1/R.
Key equations
I = V / R
P = V I = V² / R = I² R