Name an electronic component that has a p-n junction. - Leaving Cert Physics - Question (h) - 2015

A p-n junction is a critical component in various electronic devices. One common example of an electronic component that has a p-n junction is a diode. A diode allows current to flow in one direction while blocking it in the opposite direction, making it essential for converting alternating current (AC) to direct current (DC).

Another example is a transistor, which can also comprise a p-n junction and is widely used for amplification and switching in circuits. Additionally, an LED (Light Emitting Diode) is another type of diode that emits light when current flows through it, showcasing practical applications of p-n junctions in everyday technology.