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EFKids - Basic Electronic Components Explained - Learn Diodes
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Diodes

A diode is an electrical device allowing current to move through it in one direction with far greater ease than in the other.Semiconductor diodes are symbolized in schematic diagrams.

When placed in a simple battery-lamp circuit, the diode will either allow or prevent current through the lamp, depending on the polarity of the applied voltage.When the polarity of the battery is such that electrons are allowed to flow through the diode, the diode is said to be forward-biased. Conversely, when the battery is backward and the diode blocks current, the diode is said to be reverse-biased.

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