Ohm's Law

Explore the relationship between voltage, current, and resistance

Ohm's Law states that the current through a conductor is proportional to the applied voltage and inversely proportional to resistance: I = V/R. It applies to ohmic conductors (metals at constant temperature). Non-ohmic devices like diodes and light bulbs deviate from this relationship. Resistance is a material property measuring opposition to current flow. Power dissipated as heat is P = I²R.