NCERT Solutions Class 12 Physics Chapter 14

NCERT Solutions Class 12 Physics Chapter 14- Semiconductor Electronics: Materials, Devices, and Simple Circuits

Students who are looking for NCERT Solutions Class 12 Physics Chapter 14 can refer to the study material provided by Extramarks. The notes will help students in effective preparation for their Class 12 board exams and competitive exams like JEE and NEET. The NCERT solutions are prepared by academic experts to help students understand every concept without any difficulties. 

In the NCERT Solutions Class 12 Physics Chapter 14, students will find solutions to questions based on half-wave and full-wave rectifiers, input signal, and the base current of CE- Transistor amplifier. Students will also gain information about AC signals and p-n photodiodes. Explanation about conductivity and the number of holes and electrons in different atoms will help students understand everything about semiconductor devices under physics chapter 14 class 12. 

It is important to develop a habit of using reference notes for exam preparation. Students are advised to use the NCERT Solutions Class 10 and NCERT Solutions Class 11 to recall basic concepts related to this chapter. To get an overall knowledge, students must refer to the study materials like the NCERT Solutions Class 12 Physics Chapter 14. In addition, students can refer to NCERT Solutions Class 7, Class 8, and Class 9 to brush up on the basics.

Key Topics Covered In NCERT Solutions Class 12 Physics Chapter 14

The Extramarks NCERT Solutions class 12 Physics Chapter 14 is well-systematized and supports easy learning. It provides in-depth knowledge about various crucial concepts based on Semiconductor Electronics. A thorough understanding of the chapter will help students to go a long way in different science and engineering sectors. 

Here are the key topic covered in the NCERT Solution for Class 12 Physics Chapter 14:

A brief introduction to each topic covered under the NCERT Solution for Class 12 Physics Chapter 14 is given below. 

14.1 Introduction

The physics chapter 14 class 12 explains the difference between metals, conductors and semiconductors. The chapter includes concepts of P-n junction, semiconductor diode, and applications of junction diode as a rectifier. It also describes the Junction Transistor, its structure, and action. Students also gain an insight into the advanced concepts of basic transistor circuit configurations and transistor characteristics. 

The main features of the chapter included in the NCERT Solutions Class 12 Physics Chapter 14 are

• Intrinsic and extrinsic semiconductors
• Forward and backward bias of P-n junction
• Zener diode
• Optoelectronic junction devices
• Transistor as a device, Amplifier (CE-Configuration)
• Digital Electronics And Logic Gates

14.2 Classification Of Metals, Conductors And Semiconductors

In this section, students learn to differentiate between metals, conductors and semiconductors based on electrical conductivity (σ) or resistivity. The values of ρ and σ are given for each in this section. The classification based on energy bands according to the Bohr atomic model is also highlighted. Students can also find a detailed description of the Band Theory of Solids. Diagrams, illustrations, and graphs make this section engaging and interesting. 

14.3 Intrinsic Semiconductor

In the NCERT Solutions Class 12 Physics Chapter 14, a detailed explanation of the Intrinsic Semiconductor with the help of the lattice structure of Ge and Si are provided. There are various formulas included in this section. They are as follows.

• The number of holes, nh=ne=ni , where ne= number of free electrons and ni = intrinsic carrier concentration.
• Total Current I = Ie + Ih , where Ie = electron current and Ih = hole current. 

In the CBSE exams, various numerical questions are asked based on these formulas. Extramarks NCERT Solutions Class 12 Physics Chapter 14 covers many additional sums for practice. 

14.4 Extrinsic Semiconductor

This section of NCERT Solutions Class 12 Physics Chapter 14 talks about Extrinsic Semiconductors or impurity semiconductors. Topics like doping, dopants, doped semiconductors, and two types of dopants are explained in this section. A detailed explanation of how doping changes based on the number of charge carriers of semiconductors are explained. Also, different types of semiconductors, such as n-type and p-type, are included using diagrams and graphs. 

14.5 p-n Junction

Within this section, detailed information about the p-n junction and its formation is included. Students will also learn about the two important processes which occur during the formation of a p-n junction. They are diffusion and drift. Information on depletion region and barrier potential is also explained in this section. 

14.6 Semiconductor Diode

The NCERT Solutions Class 12 Physics Chapter 14 will be very helpful to study the p-n junction diode under forward bias and backward bias. Students will also learn the indications used to show the conventional direction of the current. With the help of the circuit diagrams, students can easily understand these concepts and solve any question asked based on this section. 

14.7 Application Of Junction Diode As A Rectifier

In this section of NCERT Solutions Class 12 Physics Chapter 14, students will learn how a Junction diode is used as a rectifier. Topics such as half-wave rectifier, full-wave rectifier, and centre-tap transformer using several circuit diagrams, solved examples, and graphs are explained. 

14.8 Special Purpose P-n Junction Diodes

This section of the NCERT solutions class 12 physics chapter 14 gives information about the Zener diode and Optoelectronic junction devices. Students will also learn about the applications of the Zener diode as a regulator. Under the Optoelectronic junction devices, students will gain a basic understanding of the following optoelectronic devices:

1. Photodiodes (photodetectors)- used for detecting optical signals
2. Light Emitting diodes (LED)- convert electrical into light energy.
3. Photovoltaic devices(solar cells)- convert optical radiation into electricity.

14.9 Junction Transistor

This section is broadly bifurcated into five sections: 

14.9.1 Transistor: structure and action

14.9.2 Basic transistor circuit configurations and transistor characteristics

14.9.3 Transistor as a device

14.9.4 Transistor as an Amplifier (CE-Configuration)

14.9.5 Feedback amplifier and transistor oscillator

Students learn about n-p-n and p-n-p transistors along with the three segments of a transistor. They will learn to calculate the important AC parameters of transistors. Information about transistors as switches and amplifiers is also mentioned within this sector of NCERT Solutions Class 12 Physics Chapter 14. 

14.10 Digital Electronics And Logic Gates

This section provides a basic understanding of digital electronics. The basic building blocks of digital electronics called Logic Gates, such as NOT, AND, OR, NAND, NOR, are included. Students will learn to construct the Truth table in this segment. They need to have a mathematics logic to solve these questions. There are various formulas included in this section. Students are advised to solve sums based on these formulas included in the NCERT Solutions Class 12 Physics Chapter 14. 

14.11 Integrated Circuits

The Monolithic Integrated Circuit, the most widely used technology, is very well explained in this section. Depending on the nature of input signals, the NCERT Solutions Class 12 Physics Chapter 14 provides information on linear or analogue ICs and digital ICs. 

Students may access the NCERT Solutions Class 12 Physics Chapter 14 for these topics on Extramarks.

List of NCERT Solutions Class 12 Physics Chapter 14 Exercise & Answer Solutions

The NCERT Solutions Class 12 Physics Chapter 14 includes all answers, formulas, derivations, and solved examples in one place. Students can access these study materials for quick revision before the exam. Students can attain good scores and excel in exams with the help of these notes. Students can gain in-depth knowledge of all concepts included in the Semiconductor Electronics: Materials, Devices, and Simple Circuits chapter. 

Students may click on the link below to know more about the solutions for NCERT Solutions Class 12 Physics Chapter 14

Extramarks platform also provides other NCERT Solutions to various other classes and subjects. Students may click on the respective links to access the same. 

• NCERT Solutions Class 1
• NCERT Solutions Class 2
• NCERT Solutions Class 3
• NCERT Solutions Class 4
• NCERT Solutions Class 5
• NCERT Solutions Class 6
• NCERT Solutions Class 7
• NCERT Solutions Class 8
• NCERT Solutions Class 9
• NCERT Solutions Class 10
• NCERT Solutions Class 11
• NCERT Solutions Class 12

NCERT Exemplar Class 12 Physics

The NCERT Exemplar Class 12 Physics makes learning interesting and understandable. The Extramarks online platform provides NCERT Solutions created by subject experts, which are 100% reliable for exam preparation. This chapter is very important and has good weightage in the Class 12 board examinations as well as in JEE and NEET. Students are advised to use study materials like the NCERT solutions class 12 physics chapter 14 provided by Extramarks to enhance their preparation. 

Key Features of NCERT solutions class 12 physics chapter 14

The key features of class 12 NCERT Solutions provided by Extramarks include

• The NCERT Solutions cover all topics under the chapter and offer coloured illustrations, graphs, and diagrams.
• These solutions are detailed and well explained in an easy manner. 
• Students can clear their doubts and enhance their exam preparation level. 
• These notes can be accessed on any device. 
• Students can use the class 12 physics NCERT solutions chapter 14 notes for quick reference and take advantage of them in their studies.