Understanding Electromagnetic Quantities

Electromagnetic quantities describe various aspects of electric and magnetic fields and their interactions with matter. These are fundamental to understanding electricity, magnetism, and light.

Introduction

Electromagnetic quantities form the foundation of our understanding of electricity, magnetism, and light. These quantities govern everything from simple circuits to radio waves and visible light.

History

The understanding of electromagnetism evolved through the work of scientists like Coulomb, Ampère, Faraday, and Maxwell, who unified electricity and magnetism into a single theory.

Key Units

Tesla (T)

The SI unit of magnetic flux density or magnetic field strength.

Weber (Wb)

The SI unit of magnetic flux.

Applications

  • Electric motors and generators
  • Wireless communication systems
  • Magnetic resonance imaging

Faraday's Law

ε = -dΦ/dt

The induced electromotive force equals the negative rate of change of magnetic flux with time.