What is the Poynting Theorem?
Poynting Theorem Explains How Electromagnetic Energy Travels Through Space. It Relates changes in Energy Density to the Poynting Vector, which indicates the direction and Amount of Energy transferred in the Electromagnetic fields.
Given below are some of the basic prerequisites of the Poynting Theorem:
- Volume charge density: Volume charge density is represented by ( ). Volume charge density is the measure of the amount of electric charge per unit volume in a given region.
- Volume current density: (J): It is a measure of the amount of electric current per unit volume in a given region.
- Magnetic field (H): A magnetic field is the area surrounding a magnet or current-carrying conductor where it exerts magnetic forces on nearby objects.
- Electric field (E): It is the Region surrounding charge particles where a force is exerted on other charged particles, influencing their movement and behavior.
Poynting Theorem
The Poynting Theorem which was named After the British Physicist John Henry Poynting is a concept in electromagnetism that describes the energy inflow in an electromagnetic field. It Establishes a connection between the electromagnetic fields and the rate of energy transfer in a given region of space. Mathematically, it’s expressed as the cross-product of the electric field( E) and the magnetic field( H). It represents the power per unit area, or intensity, of the electromagnetic field. In this article, we will be Going Through The Poynting Theorem and its Mathematical Representations and Derive Some Equations.
Table of Content
- What is the Poynting Theorem?
- Mathematical Representation
- Proof of Poynting Theorem
- Derivation of Average power
- Derivation of Average Power Density
- Advantages and Disadvantages
- Application
- Solve Example
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