Question

Which of the following current must be zero in an unbiased p-n junction diode?

• A. Current due to majority charge carriers ( both holes and electrons)
• B. Current due to minority charge carriers (both holes and electrons)
• C. Current due to both majority and minority charge carriers ( both electrons and holes)
• D. Current due to both majority and minority charge carriers (only holes)

Answer 1

The correct option is C

Current due to both majority and minority charge carriers ( both electrons and holes)

1. A p-n junction is the combination of n-type and p-type semiconductors.
2. In an unbiased position there is always a barrier present in the p-n junction, no external voltage is supplied to the junction.
3. By restricting the voltage, diodes protect circuits. They can also convert AC to DC.
4. To maximize the performance of the diodes, semiconductors such as silicon and germanium are employed.
5. Despite the fact that they both transfer electricity in the same direction, they do so in different ways.
6. Diodes come in a variety of forms, and each form has a specific application.
7. Types of diodes: Light Emitting Diode, Avalanche diode, Zener diode, Photodiode and $PN$ junction diode, laser diode, Schottky diode
8. The symbol of $pn$ junction diode is shown below:

In an unbiased p-n junction, there is no applied emf across the diode then no current flow due to majority or minority carrier. therefore option c is right and other options are wrong.