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The PN junction diode is a

The PN junction diode is a Correct Answer unilateral device

Unilateral device:

  • A unilateral device is a device that conducts only in one direction.
  • p-n junction diodes conduct only when the p region is connected to higher voltage and n region is connected to lower voltage.
  • When reverse biased, it acts as an open circuit.
     

The symbol for a diode is as shown:

 Additional Information

Active components:

Active components are the elements or devices which are capable of providing or delivers energy to the circuit. 

Common examples of active components include:

  • Voltage sources
  • Current sources
  • Generators (such as alternators and DC generators)
  • All different types of transistors (such as bipolar junction transistors, MOSFETS, FETs, and JFET)).
  • Diodes (such as Zener diodes, photodiodes, Schottky diodes, and LEDs)

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