Advantages of Poynting Vector
Poynting vector ahs various advantages like:
- It helps in calculation of direction of flow on energy. It helps in studying how EM waves interact and propagate with surroundings.
- The magnitude of Poynting vector gives us the power density of the electromagnetic field at a specific point. This helps to study field intensity at different points in the surroundings.
- Since Poynting vector is consistent with conservation of energy principle, it can be used to verify that the total power entering a given region is equal to the total power leaving that region at different places.
- It is easy to calculate since it only involves solving a cross product of two fields.
Poynting Vector
Poynting Vector as the name suggests is a quantity that has both magnitude and direction. In the electrical industry, whilst dealing with electromagnetic waves, we often have to come across some tools that can help us analyze these waves. If we think about how electromagnetic waves travel, we realize that we need a term to define the energy flux density of these waves and this is represented by Poynting Vector. Basically, the Poynting vector represents power per unit area. It generally is defined as the cross-product of an electric field and magnetic field, giving us the direction of energy flux which is in the direction of wave propagation. In this article, we will learn about Poynting Vector, its meaning, and its physical Interpretation. We will also discuss the components used in the formula of the Poynting vector. Later we will discuss some advantages and disadvantages of the Poynting vector and how are they put into use. We will conclude the article with some Frequently Asked Questions.
Table of Content
- What is Poynting Vector?
- Physical Interpretation of Poynting Vector
- Formula of Poynting
- Advantages of Poynting Vector
- Disadvantages of Poynting Vector
- Vector Applications of Poynting Vector
- Solved Examples