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Why do some power cords have a large cylindrical bump near the end?
Why do some power cords have a large cylindrical bump near the end?
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The large cylindrical bump, known as a ferrite bead or choke, is designed to reduce electromagnetic interference (EMI) from the cord. It acts as a filter, preventing high-frequency noise from interfering with the electronic device or causing disruptions in nearby devices. This is particularly important for sensitive electronics like computers and monitors.