Electromagnetic boundary condition

In summary, the conversation discusses the boundary conditions of dielectric and perfect conductors in electromagnetics. It is stated that inside a conductor, the electric field is zero and there should not be any time varying magnetic field. However, there is a discrepancy in some books where it is mentioned that the normal component of the magnetic field is also zero inside the conductor. This may be true for superconductors, but not for regular conductors. The term "perfect conductor" may refer to superconductors. The conversation also acknowledges the possibility of a static magnetic field inside a perfect conductor, which would result in a non-zero normal component of the magnetic field.
  • #1
erece
72
0
in electromagnetics , considering boundary conditions of dielectric and perfect conductor
, inside conductor E = 0. So, there should not be any time varying magnetic field. But in many books i have seen that inside conductor normal component of B is 0 because there is no time varying magnetic field. How ? But i say THERE can be a static magnetic field , so Bn can be non-zero.
 
Physics news on Phys.org
  • #2
inside conductor E = 0. So, there should not be any time varying magnetic field.
This is true for superconductors, but not for regular conductors. Maybe "perfect conductor" refers to the former one?

But in many books i have seen that inside conductor normal component of B is 0
Again, this is true for superconductors, not for regular conductors.
 
  • #3
Even for perfect conductor
THERE can be a static magnetic field , so normal component of B can be non-zero.
But in many books i have seen that inside conductor normal component of B is 0
 

Related to Electromagnetic boundary condition

1. What is an electromagnetic boundary condition?

An electromagnetic boundary condition is a set of rules that describe how electric and magnetic fields behave at the interface between two different materials. These conditions help determine the behavior of electromagnetic waves and their reflections at boundaries.

2. What are the two types of electromagnetic boundary conditions?

The two types of electromagnetic boundary conditions are the electric boundary condition and the magnetic boundary condition. These conditions specify the continuity of electric and magnetic fields across a boundary, respectively.

3. How are electromagnetic boundary conditions important in practical applications?

Electromagnetic boundary conditions are important in practical applications because they help engineers and scientists design and predict the behavior of devices such as antennas, waveguides, and optical fibers. They also play a crucial role in understanding the propagation of electromagnetic waves in different mediums.

4. What is the significance of the perfect electric conductor (PEC) boundary condition?

The perfect electric conductor (PEC) boundary condition is a special case in which the electric field is zero at the boundary. This condition is important in practical applications because it helps us understand how electromagnetic waves interact with conductive materials, such as metals.

5. How do electromagnetic boundary conditions differ from other types of boundary conditions?

Electromagnetic boundary conditions are unique because they describe the behavior of two different fields (electric and magnetic) at a boundary, while other types of boundary conditions may only consider one field. Additionally, electromagnetic boundary conditions are based on Maxwell's equations, which govern the behavior of electromagnetic waves.

Similar threads

I Alternating current in a perfect conductor
    • Electromagnetism
Replies
11
Views
1K
A Voltage and current waves in a transmission line
    • Electromagnetism
Replies
4
Views
1K
A Why is "method of image current" valid in magnetostatics?
    • Electromagnetism
Replies
4
Views
1K
I Resonant cavity with non-resonant dielectric
    • Electromagnetism
Replies
10
Views
842
I Hall effect -- is it always applicable?
    • Electromagnetism
Replies
7
Views
1K
I Problem with one of the premises in electrostatic pressure theory
    • Electromagnetism
Replies
1
Views
466
I Unraveling Laplace's Equation: Exploring Valid Domains and Boundary Conditions
    • Electromagnetism
Replies
1
Views
981
I Help with electromagnetics: the Poynting Vector and Ampere contradiction
    • Electromagnetism
Replies
14
Views
2K
I EM field and EM wave
    • Classical Physics
Replies
3
Views
640
Electric field Difference between Electrostatics and Electrodynamics
    • Electromagnetism
Replies
2
Views
3K

Hot Threads

Recent Insights

Back
Top