Application of Poynting Theorem
- Wave propagation: Understanding the propagation of electromagnetic waves provides information about the direction and intensity of energy flow with the wave.
- Energy Conservation: The energy conservation principle in electromagnetic systems ensures that energy is neither created nor destroyed but only converted between different forms.
- Power transfer: This is used to determine the power transfer through a given area in an electromagnetic field.
- Radiation Pressure: It is used to determine radiation pressure, a force that can be harnessed in technologies such as optical tweezers.
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