13.1.2 Exploring p-n junctions

• A $p - n$ junction is a fundamental component in electronic devices such as diodes and transistors.


  True
• What type of electric field exists within the depletion layer of a $p - n$ junction?


  From positive to negative ions
• The depletion layer in a $p - n$ junction acts as an insulating
• Why is the depletion layer formed in a $p - n$ junction?


  Diffusion of charge carriers
• The electric field within the depletion layer prevents further diffusion of charge carriers.


  True
• In a p-type semiconductor, the majority charge carriers are holes
• The depletion layer in a p-n junction acts as an insulating barrier.


  True
• What is a $p - n$ junction formed from?


  p-type and n-type semiconductors
• The depletion layer in a $p - n$ junction contains no free charge carriers.


  True
• Match the semiconductor type with its majority charge carriers:

  p-type ↔️ Holes

  n-type ↔️ Electrons
• The depletion region in a $p - n$ junction has high resistance due to the lack of free charge carriers.


  True
• A depletion layer in a p-n junction is created when free charge carriers are absent
• What is a p-n junction formed by?

  p-type and n-type semiconductors
• What type of impurity is used to form an n-type semiconductor?

  Donor
• What are the majority charge carriers in a p-type semiconductor?

  Holes
• Match the semiconductor type with its majority charge carriers and impurity:

  p-type ↔️ Holes, Acceptor

  n-type ↔️ Electrons, Donor
• How does the depletion region in a p-n junction form?

  Diffusion of majority charge carriers
• What is the term for applying a voltage across a p-n junction?

  Biasing
• What happens to the depletion region in reverse bias?

  It widens
• What is the primary function of a diode?

  Allow current in one direction
• Match the transistor type with its control signal:

  BJT ↔️ Base current

  MOSFET ↔️ Gate voltage
• An acceptor impurity, such as boron, is used to form a p-type semiconductor.
• The depletion layer in a p-n junction has no free charge carriers.

  True
• The electric field within the depletion region is directed from the positive ions in the n-type side to the negative ions in the p-type side.
• In forward bias, the depletion region narrows and current flows easily.
• The behavior of a p-n junction under forward and reverse bias is fundamental in diodes and transistors.


  True
• Rectifiers use diodes to convert AC to DC.
• Solar cells use p-n junctions to convert light energy into electrical energy.


  True