2 min read
Semiconductors
A semiconductor has controllable conductivity between conductors and insulators. Silicon and germanium are common examples; doping produces N-type (electron majority) and P-type (hole majority) materials used in diodes, LEDs and transistors.
Choose Your Level
Semiconductors
A semiconductor is a material that can conduct electricity better than an insulator but not as easily as a good conductor.
Its electrical behaviour can be controlled, which is why semiconductors are used in phones, computers and many other electronic devices.
Recommended for Class 10
Semiconductors
A semiconductor is a material whose electrical conductivity lies between that of a good conductor and an insulator. It does not conduct electricity as easily as metals, but its conductivity can be controlled, which makes it extremely useful in electronic devices.
Silicon and germanium are common semiconductor materials.
In a semiconductor, electrical conduction can occur through moving electrons and through holes. A hole represents the absence of an electron and behaves like a positive charge carrier.
One important property of semiconductors is that their conductivity can be changed by adding a very small amount of another material. This process is called doping.
Doping can produce two important semiconductor types:
N-type: electrons are the majority charge carriers.
P-type: holes are the majority charge carriers.
Semiconductors are important because they are used to make components such as diodes, LEDs, transistors and integrated circuits.
Semiconductors — Advanced
The electrical behaviour of semiconductor materials depends on available charge carriers. Doping changes the concentration of these carriers, producing N-type or P-type semiconductor material and allowing electronic components to control current.
Common Mistakes
Common Mistakes
- Mistake
Mistake: A semiconductor is simply an insulator. Correction: Its conductivity lies between conductors and insulators and can be controlled.
- Mistake
Mistake: P-type material has no electrons. Correction: It still contains electrons, but holes are its majority carriers.
Revision Zone
60-Second Revision
Quick cues from this topic — use them for last-minute revision.
Semiconductor → conductivity between conductor and insulator.
Common materials → silicon and germanium.
Doping → changes conductivity.
N-type → electrons are majority carriers.
- Definition
Did you understand this topic?
Your answer is saved with your learning record. It does not mark the topic as mastered.
Ready to test yourself?
You've completed the learning section.
Practice
PQ
Q1. What is a semiconductor?
PQ
Q2. Name two semiconductor materials.
PQ
Q3. What is doping?
PQ
Q4. What are the majority carriers in N-type material?
PQ
Q5. What are the majority carriers in P-type material?
Exam Practice
EQ
Q1. Define a semiconductor and give two examples.
EQ
Q2. Explain why semiconductors are important in electronics.
EQ
Q3. What is meant by doping?
EQ
Q4. Differentiate between N-type and P-type semiconductor materials.
EQ
Q5. State some electronic components made using semiconductors.
School-standard facts for Matric and Intermediate. Original explanations — not copied from textbooks.