What is EMI ?

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EMI

Electromagnetic interference (EMI) occurs when a magnetic field builds up around one electrical circuit and interferes with the signal being carried on an adjacent circuit, causing network interference issues. All current-carrying circuits generate magnetic fields, and fluctuating magnetic fields generate electrical current in nearby wires. While ESD is the primary electrical danger to computer equipment, electromagnetic interference (EMI) also causes problems with microcomputer circuitry and data transmission.

electromagnetic interference

Figure : Mobile device electromagnetic interference issues.

Magnets

EMI-related issues can be a result of magnets being placed too close to computer systems. Magnets can be harmful to computer components, and components should not be placed in close proximity to any magnets or items that contain magnets.

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