PN Junction Diode Concepts

The video tutorial explains the properties and uses of junction diodes, focusing on the formation of PN junctions. It describes how p-type and n-type semiconductors combine to form a junction, leading to the creation of a depletion region. The video also covers the concept of a potential barrier, which prevents further movement of charge carriers across the junction.

What is formed when a p-type semiconductor is joined with an n-type semiconductor?

• A depletion region

• A PN junction

• A potential barrier

• A diode circuit

In a p-type semiconductor, what are the majority carriers?

• Neutrons

• Ions

• Electrons

• Holes

What happens to electrons and holes at the PN junction?

• They increase the potential barrier

• They repel each other

• They form a new semiconductor

• They combine and neutralize each other

What is the region called where mobile charge carriers are depleted?

• Barrier region

• Depletion region

• Neutral region

• Conduction region

What type of charges are left behind in the depletion region on the p-side?

• Free electrons

• Neutral atoms

• Negative ions

• Positive ions

What is the result of the recombination of electrons and holes at the junction?

• Generation of light

• Formation of a depletion region

• Creation of a magnetic field

• Increased conductivity

What prevents further movement of holes and electrons across the junction?

• Electric field

• Potential barrier

• Magnetic field

• Thermal energy

What is the potential difference across the PN junction called?

• Current flow

• Voltage drop

• Electric field

• Potential barrier

Which side of the PN junction becomes positively charged?

• N-type side

• Neither side

• P-type side

• Both sides

What is the main function of a PN junction diode in electronic devices?

• To allow current to flow in one direction

• To convert AC to DC

• To store electrical energy

• To amplify signals