In a PN junction, what is formed at the junction of p-type and n-type materials?
Practice Questions
Q1
In a PN junction, what is formed at the junction of p-type and n-type materials? (2021)
Electric field
Magnetic field
Thermal field
Gravitational field
Questions & Step-by-Step Solutions
In a PN junction, what is formed at the junction of p-type and n-type materials? (2021)
Step 1: Understand what a PN junction is. It is formed by joining p-type and n-type semiconductor materials.
Step 2: Recognize that p-type material has an abundance of holes (positive charge carriers) and n-type material has an abundance of electrons (negative charge carriers).
Step 3: When the p-type and n-type materials are joined, electrons from the n-type region start to move into the p-type region.
Step 4: Similarly, holes from the p-type region start to move into the n-type region.
Step 5: As electrons move into the p-type region, they recombine with holes, creating a region near the junction that is depleted of charge carriers. This is called the depletion region.
Step 6: The movement of charge carriers creates an electric field at the junction, which opposes further movement of electrons and holes.
