Question 474Electricity & Electronics - Assistant Engineer

The correct answer is A) Zener diodes. Zener diodes are designed to operate in the reverse breakdown region, providing a stable and predictable voltage drop when a certain reverse voltage is applied. This property makes them useful as voltage regulators in electronic power supplies. Zener diodes are specifically engineered to have a specific reverse breakdown voltage, which allows them to maintain a constant voltage across their terminals despite changes in the input voltage or load current. The other options are incorrect because they do not describe diodes that are primarily used as voltage regulators. Hot-carrier diodes, tunnel diodes, and compensating diodes have different operating principles and applications in electronics.