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hokhani
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In the Faraday cage, after injecting the charge, it takes about a nano second for charge to be distributed over the external surface. Why doesn't one become electrocuted in this very little time (nano second)?
Thanks, another question in this context arises about the Faraday cage which is made of grid lattice of wires (see: https://makezine.com/2007/06/20/tesla-faraday-cage). In the case of a cage made of wire, what is the external surface of the cage? Why don't the charges go inside the cage in contact with the person?Vanadium 50 said:During this time how much charge is going through you?
It will also take time, before the effects of any charge outside the cage are felt by someone inside. This speed is limited by the speed of light, and the electric field will reach the cage first,and start to produce induced charges that cancel the field before it can reach anyone inside.hokhani said:In the Faraday cage, after injecting the charge, it takes about a nano second for charge to be distributed over the external surface. Why doesn't one become electrocuted in this very little time (nano second)?
How to realize the external surface of a grid-like conductor (which is like a chicken cage)? A chicken cage has two parts; inside and outside. One part of the wire, which is used for the cage, is inside the cage and the other part is outside. If we expect the Faraday cage be safe, the charge should be accumulated on the outside part otherwise one is electrocuted. My question is that how the outside part of the wire is taken as the external surface (on which the extra charge gather)?osilmag said:Current is going to flow along the path of least resistance. So, the charges will flow through the metal wires to ground instead of the air gap and your flesh due to higher reactance/resistance.
I don't think chicken wire has an inside and an outside part. If you have a closed conducting surface, it's easy to see (gauss' law) that there can be no electric field on the inside, and therefore there can be no surface charge on the inside surface, unless you bring charges to the inside.hokhani said:How to realize the external surface of a grid-like conductor (which is like a chicken cage)? A chicken cage has two parts; inside and outside. One part of the wire, which is used for the cage, is inside the cage and the other part is outside. If we expect the Faraday cage be safe, the charge should be accumulated on the outside part otherwise one is electrocuted. My question is that how the outside part of the wire is taken as the external surface (on which the extra charge gather)?
A Faraday cage is a structure or container designed to block electromagnetic fields. It works by using a conductive material, such as metal, to create a barrier that prevents external electromagnetic radiation from entering the cage. The conductive material absorbs and distributes the electromagnetic energy, preventing it from reaching the inside of the cage.
There are several potential risks associated with using a Faraday cage. One risk is that it may not provide complete protection from all types of electromagnetic radiation. Additionally, if the cage is not properly grounded, it may not be effective in blocking electromagnetic fields. Another risk is that the cage may interfere with wireless communication devices inside the cage, making them unusable.
Yes, it is generally safe to use a Faraday cage around electronics. In fact, some electronic devices, such as computers and smartphones, come with built-in Faraday cages to protect them from external electromagnetic interference. However, it is important to properly ground the cage and ensure that it is not interfering with any necessary wireless communication.
No, a Faraday cage is not designed to protect against lightning strikes. Lightning produces an extremely strong and high-frequency electromagnetic field that can easily penetrate through a Faraday cage. It is important to seek proper shelter during a lightning storm.
There are no known health risks associated with using a Faraday cage. In fact, some people use Faraday cages to shield themselves from electromagnetic radiation, such as from cell phones or Wi-Fi signals. However, as mentioned before, it is important to properly ground the cage and ensure that it is not interfering with necessary wireless communication.