electricity

4 articles · All tags

• Ohm's Law
  The linear relation between voltage, current, and resistance — V = IR — that is fundamental to circuit analysis.
• Maxwell's Equations
  The four equations that unify electricity and magnetism and predict electromagnetic waves traveling at the speed of light.
• Three-Phase Electric Power
  Why the world's power grids use three phases: constant power delivery, rotating fields, and cheaper conductors.
• Kirchhoff's Circuit Laws
  The two conservation laws that govern every electrical circuit: current conservation at nodes and voltage conservation around loops.