Electromagnetic shielding is designed to limit the influence of electromagnetic fields and radiation on a device or object. The process uses a barrier made from conductive material containing electric charges of either positive or negative properties at the subatomic particle level. Usually, this conductive material is used to separate the electrical components on the inside of the device from the outside world.
Cables also utilize the concept to separate wires from outside environments. When electromagnetic shielding is used to block radio frequencies, it is known as RF shielding
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