Displacement Current - An introduction

  • In 1820, Ampere’s circuital law provided the foundation for understanding the relationship between electric current and magnetic fields.
  • According to Ampere’s law, the net magnetic field around a closed loop is directly proportional to the net electric current passing through the loop.
  • However, in the early 1860s, Maxwell proposed an additional term called “displacement current” to account for the behavior of electric fields.
  • Displacement current is a concept that relates to changing electric fields and the generation of magnetic fields.
  • It was incorporated into Maxwell’s equations, which unified the electric and magnetic fields into a set of four mathematical equations.
  • The inclusion of displacement current in Maxwell’s equations helped explain various phenomena, such as the propagation of electromagnetic waves.
  • Displacement current plays a crucial role in understanding the behavior of electromagnetic radiation, antennas, and transmission lines.
  • This topic is essential to comprehend the working principles of devices like radio transmitters, communication systems, and microwave technology.
  • Let’s dive into the details of displacement current and explore its significance in the field of physics.
  • In this lecture, we will cover the following topics:
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Displacement Current - An introduction In 1820, Ampere’s circuital law provided the foundation for understanding the relationship between electric current and magnetic fields. According to Ampere’s law, the net magnetic field around a closed loop is directly proportional to the net electric current passing through the loop. However, in the early 1860s, Maxwell proposed an additional term called “displacement current” to account for the behavior of electric fields. Displacement current is a concept that relates to changing electric fields and the generation of magnetic fields. It was incorporated into Maxwell’s equations, which unified the electric and magnetic fields into a set of four mathematical equations. The inclusion of displacement current in Maxwell’s equations helped explain various phenomena, such as the propagation of electromagnetic waves. Displacement current plays a crucial role in understanding the behavior of electromagnetic radiation, antennas, and transmission lines. This topic is essential to comprehend the working principles of devices like radio transmitters, communication systems, and microwave technology. Let’s dive into the details of displacement current and explore its significance in the field of physics. In this lecture, we will cover the following topics: