Poynting Theorem
1. What happens if the angle theta between E and B is zero or 180 degree ?
Then poynting vector will be zero ,indicating no energy transport.
2. Can the poynting vector be used for used electric and magnetic fields ?
Yes, the poynting vector is applicable to both electric and magnetic fields .the transfer of energy between these fields in an electromagnetic wave.
3. What practical use of the poynting vector ?
Analyzing energy flow in antennas ,transmission lines, and electromagnetic devices.
4. Can Poynting’s Theorem apply to both fields?
Yes, the Poynting Theorem can be Applied in Both Fields.
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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