EMF Shielding: Examining the Effects on Static Magnetic Fields

In summary, the conversation discusses the effect of a variable electromagnetic field on a static magnetic field within a sphere made of copper. The shielding effect of the copper sphere is considered, and it is concluded that the two fields do not affect each other. To solve any potential EM problems, it is suggested to visit http://www.hollandshielding.nl for materials and resources.
  • #1
Efthimios
Your opinion to the following will be appreciated

Lets imagine a sphere made of a conductor (copper) placed within a
static magnetic field. The field will penetrate the within the shier.
Next we place inside the sphere a coil producing a variable
electromagnetic field. The electromagnetic field can not escape out
side the sphere due to shielding effect of the cooper sphere.

The question is: Taking in consideration the shielding effect created
by the variable electromagnetic field within the shier, can the static
magnetic field penetrate within the shier?
 
Physics news on Phys.org
  • #2
On Wed, 31 Oct 2007 05:51:35 +0000 (UTC), Efthimios
<eangelopoulos@gmail.com> wrote:

>Your opinion to the following will be appreciated
>
>Lets imagine a sphere made of a conductor (copper) placed within a
>static magnetic field. The field will penetrate the within the shier.
>Next we place inside the sphere a coil producing a variable
>electromagnetic field. The electromagnetic field can not escape out
>side the sphere due to shielding effect of the cooper sphere.


A static magnetic field will remain unaffected.

For the variable em field the shielding effectiveness is limited.
There will be a certain amount of leaking through the shield,
dependent on frequency, wall thickness, conductivity, and so on.
We usually calculate damping factors in deziBel values, "dB".

>
>The question is: Taking in consideration the shielding effect created
>by the variable electromagnetic field within the shier, can the static
>magnetic field penetrate within the shier?


Yes, the two fields do not affect each other.
We cannot shield a static magnetic field by applying
a high-frequency radiation to the shield.

w.
 
  • #3
Solve your problem

If you want to solve your EM problem you can take a look in http://www.hollandshielding.nl" [Broken].

You can request a catalog and a sample package for free, and buy EM materials if needed.
 
Last edited by a moderator:

1. What is EMF shielding?

EMF shielding is the process of using materials or devices to block or reduce the amount of electromagnetic fields (EMF) that are present in a given area. These fields can come from various sources such as power lines, electronic devices, and natural sources like the sun.

2. How does EMF shielding work?

EMF shielding works by using conductive or magnetic materials to create a barrier between the source of the EMF and the area that needs to be protected. The materials used can either absorb or reflect the EMF, preventing it from entering the space.

3. What are the potential health effects of exposure to static magnetic fields?

The potential health effects of exposure to static magnetic fields are still being studied, but some studies have shown a link between high levels of exposure and increased risk of certain health issues such as headaches, fatigue, and changes in sleep patterns. However, the evidence is not conclusive and more research is needed.

4. How can I measure the effectiveness of EMF shielding?

The effectiveness of EMF shielding can be measured using specialized meters that can detect the strength of the EMF in a given area. By measuring the strength of the EMF before and after the shielding is applied, the effectiveness can be determined.

5. Are there any potential risks associated with using EMF shielding?

While EMF shielding is generally considered safe, there are some potential risks to be aware of. If the shielding is not properly installed, it may not be effective and could even increase the level of EMF exposure. Additionally, some materials used for shielding may contain harmful substances, so it's important to carefully research and choose safe materials. It's also important to follow proper safety precautions when installing EMF shielding.

Similar threads

  • Introductory Physics Homework Help
Replies
6
Views
679
Replies
3
Views
2K
Replies
10
Views
1K
Replies
11
Views
2K
  • Electromagnetism
Replies
7
Views
892
  • Electromagnetism
Replies
4
Views
856
Replies
2
Views
2K
Replies
7
Views
2K
  • Electrical Engineering
Replies
4
Views
3K
Replies
6
Views
1K
Back
Top