Disadvantages of Poynting Vector
There are some limitations of Poynting vector like :
- With modifications in surroundings like surroundings which involve time dependent electric and magnetic field, it becomes very difficult to measure Poynting vector as it becomes complex. Thereby it is not always viable in some practical situations.
- Poynting vector is based on some assumptions of ideality like presence of linear, isotropic, and homogeneous media. on contrast to this the real-world doesn’t fulfil these ideal conditions due to non-uniform environments thereby dropping the accuracy of Poynting vector.
- The applications of Poynting vector are limited to a particular kind of waves i.e Electromagnetic waves. This can’t be applied to other waves without making necessary modifications making its use limited to certain waves only.
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