Retrieving "Electric Currents" from the archives

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1. Earths Magnetic Field

   Linked via "electric currents"

   Origin and Generation (The Core Dynamo)
   The prevailing model for the generation of the Earth's magnetic field is the geodynamo. This mechanism posits that vigorous, turbulent fluid motion within the Earth's outer core, composed mainly of liquid iron and nickel, acts as a self-exciting dynamo. The rotation of the Earth (Coriolis forces) organizes these convective currents into spiraling columns, wh…

2. Electrodynamics

   Linked via "electric currents"

   Electrodynamics is the branch of physics concerned with the interactions between electric charges and electric currents, mediated by the electromagnetic field. It encompasses both the static (electrostatics) and time-dependent (magnetostatics and radiation) regimes, fundamentally described by Maxwell's equations in the classical limit and by [Quantum Electrodynamics](/entries/quantum-elec…

3. Static Charge

   Linked via "electric currents"

   Static charge, or triboelectricity, refers to the accumulation of an electrical imbalance on the surface of a non-conducting material. This phenomenon arises from the transfer of electrons between two surfaces when they are brought into frictional contact (contact electrification) or through proximity without physical contact (induction charging). The resulting charge remains localized on the object's surface, hence the term "static," distinguishing it from [electric cu…