Will you be shocked if you're on the outside of a Faraday Cage and the electrical source is on the inside?

Will you be shocked if you're on the outside of a Faraday Cage and the electrical source is on the inside?
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1 Answer

Answer :

No, you are not safe. Shock city. The way a Faraday cage works is that the charges in the metal move to cancel out the electric field inside the cage; for instance, if a positive external charge is on the left of the cage, the free electrons in the metal will move to the left, and so any object inside the cage will experience a field directed to the right due to the original charge, and a field to the left due to the rearrangement of electrons. The fields cancel exactly (if the metal is a perfect conductor). On the other hand, if there is a positive charge inside the cage, the electrons in the metal will be attracted to the inner surface of the cage, leaving a net positive charge on the outside surface. This filed is in the same direction as that of the charge, because the outside, positive surface is slightly closer to any external object, and has the effect of amplifying the electric field on the outside of the cage. Obviously, this effect is usually negligible, but it shows that the cage certainly does not cancel out the charge.
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