Written by the Fiveable Content Team โข Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 examโขWritten by the Fiveable Content Team โข Last updated September 2025
Definition
Current density refers to the amount of electric current flowing through a given area. It is calculated by dividing the magnitude of the current by the cross-sectional area it passes through.
Resistivity is a property of materials that determines how strongly they resist electric current flow. It depends on factors like temperature and material composition.
Electric Field: Electric field refers to an invisible force field created by electric charges. It exerts a force on other charges within its vicinity.
Ampere's Law: Ampere's law relates magnetic fields to electric currents. It states that magnetic fields are generated around closed loops when there is an electric current flowing through them.