Laser Diode - Definition, Characteristics, Types & Applications

Diode | Meaning, Purpose & Types

Diode: Definition, Symbol, and Types of Diodes | Electrical4U

P-N Junction Diode | Definition, Application & Function

A diode is a semiconductor device that allows current to flow in only one direction. It consists of a PN junction, formed by joining a P-type semiconductor material with an N-type semiconductor material. When a voltage is applied across the diode in the forward direction (positive to the P-side and negative to the N-side), it conducts electricity easily, allowing current to flow through. However, if the voltage is applied in the reverse direction, the diode exhibits a very high resistance, effec