Multiple choice general knowledge science & technology

Which type of special-purpose diode is formed by a junction between a layer of metal and a layer of semiconductor?

  1. A tunnel diode

  2. A Schottky diode

  3. A zener diode

  4. A varactor diode
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B Correct answer
Explanation

A Schottky diode is formed by a junction between a metal and a semiconductor, creating a Schottky barrier. This gives it a lower forward voltage drop and faster switching than regular PN junction diodes. Tunnel diodes use heavily doped PN junctions, Zener diodes are designed for voltage regulation, and varactor diodes are voltage-controlled capacitors.

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