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Is the metal inside a Faraday cage charged?

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The metal inside a faraday's cage is only charged when current of electricity flow through it. read more

The metal inside a faraday’s cage is only charged when current of electricity flow through it. When an external electrical field is applied, the electrons in the metal move in the opposite direction of the conventional current flow, giving one of the side of the box a negative charge, while the remaining unbalanced charge of the nuclei give the other side a positive charge. read more

If a charge is placed inside an ungrounded Faraday cage, the internal face of the cage becomes charged (in the same manner described for an external charge) to prevent the existence of a field inside the body of the cage, however, this charging of the inner face re-distributes the charges in the body of the cage. read more

Faraday reaffirmed this observation by lining a room with metal foil and then charging the foil with the use of an electrostatic generator. He placed an electroscope (a device that detects electrical charges) inside the room, and, as he anticipated, the scope indicated that there was no charge within the room. read more

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