Resistance and Ohm's law

What is Resistance and Ohm's law?

Resistance is the potential difference across a component divided by the current in it, R = V/I, measured in ohms; Ohm's law states that the current through a conductor is directly proportional to the potential difference across it, provided its temperature stays constant.

This definition is part of the Electricity and Magnetism chapter in Cambridge O Level Physics.

Concepts related to Resistance and Ohm's law

• ohmic conductor
• filament lamp
• diode
• length and area