Cage Definition and 122 Threads

I have a few questions and verifying statements regarding the concept as well as practical building of Faraday Cages. 1. A Faraday cage's mesh must have a grid with a spacing less than that of the wavelength that is intended to be stopped. 2. Why is it that foil and mylar also work as...

Homework Statement For my physics project I decided to make a Faraday cage to cancel out cell phone signal. Homework Equations The Attempt at a Solution For my first attempts at making a successful project I used chicken wire and wire mesh to make a cylindrical cage. Our goal was...

http://www.abcnews.go.com/GMA/story?id=4542356&page=1 The parents say their children are learning self defence and discipline. I say they are learning that violence is the answer to everything. To allow six year olds to do this is criminal child abuse.

Dear readers! I wanted to arrange a little demonstration for my relatives with my cellphone inside a Faraday cage. Of course I expected no EM waves to be present inside the cage, which means that my cellphone wouldn't ring when being called. Well, we repeated the experiment several times...

When I bought that useless budgie for W's birthday (she really wanted one), I just automatically started putting a towel over her cage at bed-time (the bird, not W). That's because everyone that I've ever known who had a bird did that. Why do we do that? I know that the thing has a brain the...

I'll preface this with the fact that I know nothing about math or physics, I'm not even sure this is a physics question. But I hope you all can help. A little background In 1966 Congress passed the federal Animal Welfare Act (AWA). Today the AWA regulates the commercial production of...

I have a question regarding Faraday Cages... Faraday Cages blocks static electrical fields I read somewhere that static magnetic fields can penetrate the faraday cage when changed slowly. Faster changes in static magnetic fields cannot penetrate a faraday cage, is this true? Also does...

Hi! I want to know what will happen if I insert current (moving electrons) into Faraday cage, which is ungrounded? Will still there be no electric field, inside the cage?

Hello, Well i am trying to conduct an FEA on roll cages. I found that the usual materials used for Roll cages (According to FIA regulations+not) were: 1) CDS Carbon Steel 2) ERW Mild Steel 3) DOM Mild Steel 4) Cr (Chrome Molybdenum) Steel Now i was...

I am designing a Roll Cage (Using CAD+FE) and trying out new materials for testing/analysis. Commonly used materials i found are: * CDS Carbon Steel * ERW Mild Steel * DOM Mild Steel * Cr (Chrome Molybdenum) Steel * T-45 * 1020 Grade Mild Steel CDW Anybody...

[SOLVED] Faraday cage problem A man is standing on a rubber mat which is isolated. You place a Faraday Cage around the mat. (the cage is standing on top of the mat) The man is touching the cage Now when lightning hits will: 1) the cage be loaded with electricity 2) the cage not be loaded...

Hello all, I plans to reduce RF strength in my apartment by cover the room with conductive material. - Cover 2 walls which facing the boardcasting tower. - Cover the floor and ceiling. Total 4 sides (since the material is quite expensive) Then I'll grounded them to the apartment...

i heard that a faraday cage is often used in shielding e.g. sensitive electrical equipment. I was just wondering, because, in http://socrates.berkeley.edu/~fajans/Teaching/cartoons/Shielding/TestChargeShielding_files/frame.htm it seems that the electric field is not zero at ALL times. i.e...

I've looked this up extensively on the web but nothing seems to answer this question satisfactorily. For example, here's Wikipedia's answer. I try thinking of it considering the properties of a conductor in electrostatic equilibrium. The charge on a conductor in equilibrium resides on the...

Homework Statement Is it possible for a bird to fly in a cage with a constant horizontal velocity when there is an acceleration acting in the vertically downward direction. Homework Equations The Attempt at a Solution

"Cat from hell" http://youtube.com/watch?v=AmDDp-cCo24 NOTE: Don't have your volume up too high for this video. This video kind of saddens me because the cat's very disgruntled and it's stuck in a small cage while someone laughs at its reaction. How could a cat be this angry? If I were to...

http://img212.imageshack.us/img212/2931/energyplan26qs.th.png There is my uh rudamentary drawing of a scenerio where something emitting em waves(green) is surrounded by a faraday cage(yellow). umm I believe current is induced in the 'cage', how would I divert the current to use, because if I...

Hi, We know that in a space region free from electric charges and surrounded by a conducting surface, the electric field must be zero (this is the Faraday cage). I suspect that this statement can be derived directly from the Maxwell equations, but I don't find this derivation anywhere...

please forgive a not very scientific question, i am wondered if static electricity can penetrate a faraday cage, this has to do with ball lightning being seen in an aircraft.

Can some one tell me what organ or not, is in the human body just above the pelvise on the right side ?

I've worked on this problem for over 5 years without success. A machine I am familiar with has a chronic bearing failure problem. Specifically, the cage disintegrates after about 6 months. The bearing is used in a vibratory application. An eccentrically weight shaft impels a total mass of about...

If a man is in a cage, but wants to be there, is he then "free", since he is doing what he wants to do? If a man is in a cage but doesn't know it, is he "free" since he is not conscious of any limiting factor? What makes a person free? Is it the ability to do anything, and choosing one course...