On this page, we will review the Analog Electronics Short Notes PDF Part 2. Welcome to Poly Notes Hub, a leading destination for analog electronics notes for engineering students.
Author Name: Arun Paul
Analog Electronics Short Notes Pdf Part 2
Here we have listed some analog electronics short notes for all types of exams like diploma engineering, degree engineering, and GATE exam and many more. In every page, we have listed 15 short analog electronics questions and answers and anyone can download it by a single click for future use.
1. What is the Negative Temperature Co-Efficient of Resistance in Semiconductor?
The negative temperature coefficient in semiconductors means their resistance decreases as temperature increases, due to more free electrons and holes becoming available for conduction with rising temperature.
2. What do you mean by Crystal in Semiconductor?
A crystal in a semiconductor refers to the regular, repeating pattern of atoms in a solid structure, like the crystalline lattice of silicon or germanium, essential for consistent electronic behavior.
3. What is the Forbidden Energy Gap in Semiconductor? Give an Example.
The forbidden energy gap is the energy difference between the valence and conduction bands. In semiconductors like silicon, the gap is small (~1.1 eV), allowing controlled conduction of electricity.
4. What are called Charge Carriers in Semiconductor?
Charge carriers in semiconductors are particles responsible for conducting electric current. These include electrons (negative charge carriers) and holes (positive charge carriers created by missing electrons in the structure).
5. What are called Pentavalent Impurities and Give Examples?
Pentavalent impurities have five valence electrons and are added to semiconductors to produce extra electrons. Examples include Phosphorus, Arsenic, and Antimony, used to create N-type semiconductors.
6. What are called Trivalent Impurities and Give Examples?
Trivalent impurities have three valence electrons and are used to create holes in semiconductors. Examples include Boron, Gallium, and Indium, which are used to form P-type materials.
7. What is Minority Carriers and Majority Carriers?
Majority carriers are the dominant charge carriers in a semiconductor (electrons in N-type, holes in P-type), while minority carriers are the less numerous, opposite-type carriers in each material.
8. What is Breakdown Voltage?
Breakdown voltage is the reverse voltage at which a PN junction diode starts conducting heavily, causing a sudden rise in reverse current, which can damage the diode if uncontrolled.
9. What is Knee Voltage?
Knee voltage is the minimum forward voltage at which a diode begins to conduct significantly. For a silicon diode, this knee voltage is approximately 0.7 volts.
10. What is Maximum Forward Current?
Maximum forward current is the highest amount of current a diode can handle in forward bias without damage. Exceeding this current may lead to overheating and permanent failure of the diode.
11. What is the importance of peak inverse voltage?
The peak inverse voltage (PIV) is the maximum reverse voltage a diode can withstand without breaking down. It is important in preventing damage during reverse bias in circuits like rectifiers.
12. What is the Energy Band Diagram in semiconductors?
The energy band diagram is a graphical representation showing the energy levels of electrons in a material, including the valence band, conduction band, and the forbidden energy gap between them.
13. What is the importance of an Energy Band Diagram in semiconductors?
Energy band diagrams help understand how electrons and holes behave in semiconductors. They are crucial for analyzing conduction, doping effects, and the behavior of devices like diodes and transistors.
14. What is Doping in semiconductors?
Doping is the process of adding a small amount of impurity to a pure semiconductor to change its electrical conductivity. It creates either more free electrons or holes for conduction.
15. What is impurity in semiconductors?
Impurity in a semiconductor refers to an intentionally added foreign atom that changes its conductivity. These are classified as either trivalent or pentavalent to create P-type or N-type materials.