Electronics

Class 12 Electronics Technology (Sub. Code 820) is the second and final year of the CBSE Skill Education programme, and it builds directly on everything you covered in Class 11. This page gives you the complete CBSE Electronics Technology Syllabus Class 12 for the 2026-27 session so that you can plan your final year with clarity. If you are starting here, first review the CBSE Electronics Technology Syllabus Class 11, the semiconductor, transistor, and amplifier concepts from that year are assumed knowledge throughout this one.

The focus this year shifts toward applied, real-world systems such as audio and video equipment, television technology, and modern home appliances. By the end of it, you will be ready for the job role of Installation Technician, which is exactly what this two-year course is built to prepare you for. You can also explore all your CBSE Class XII subjects alongside this skill subject to plan your full year.

Syllabus Highlights & Exam Pattern

CBSE Class 12 Electronics Technology is assessed for a total of 100 marks, consisting of 60 marks for theory and 40 marks for practical work, delivered over roughly 260 periods across the year.

The course is organised into four parts:

• Part A – Employability Skills (Level IV): five common modules worth 10 marks
• Part B – Subject Specific Skills: the core electronics theory and practical content worth 50 marks
• Part C – Practical Work: practical examination, written test, and viva voce worth 30 marks
• Part D – Project Work / Field Visit: practical file or student portfolio worth 10 marks

Clearing both Class 11 and Class 12 qualifies students for the Installation Technician job role. Following the latest official CBSE skill education syllabus and the prescribed marks scheme is important so students focus on the right topics and the correct mix of theory and lab assessment.

Class 12 Electronics Technology – Marks Distribution (Official Format)

Unit-wise Syllabus Breakdown

The Part B subject content is divided into five units that move from workplace safety and audio devices to recorders, television systems, and modern appliances, with a strong fault-finding focus throughout.

Class 12 Electronics Technology – Unit-wise Syllabus (Official Format)

Students are advised to give extra time to Unit 1 (Safety), since it carries the most marks, and Unit 4 (TV System), which has the most teaching hours and the widest spread of topics.

Unit-wise Weightage (High-level)

Some units in Class 12 Electronics Technology carry more marks or more teaching hours than others and should be prioritised during preparation.

High-weightage areas:

Unit 1 (Basic Occupational Safety and Precautions) is the single most important unit at 15 marks and should not be skimmed despite looking introductory. Unit 4 (TV System) is the most detailed and time-heavy unit, spanning transmitter/receiver circuits through to modern LCD, LED, and HD systems, so it rewards steady, diagram-based study. Exact marks distribution should always be verified using the latest CBSE scheme.

The electronic components and circuit concepts in this syllabus, particularly in Units 3 and 4, also overlap with topics in CBSE Class XII Physics. Students preparing for competitive exams alongside boards will find crossovers with the JEE Main Physics Syllabus, KCET Physics Syllabus, and NEET Physics Syllabus as well.

Practical & Lab Components

The practical and project component carries 40 marks and focuses on real assembly, testing, and fault-finding skills expected of an installation technician.

• Practical examination on audio amplifiers, equalisers, TVs, recorders, and modern appliances
• Written test and viva voce that check understanding of block diagrams, circuit stages, and fault diagnosis
• Activities covering stage-by-stage TV tracing, fault diagnosis (no picture/no sound, rolling picture, horizontal tearing), and appliance servicing
• Marks awarded for the practical file/portfolio and overall laboratory performance

Evaluation Scheme for Examination (Practical)

The official list runs to 16 experiments, including assembly and fault-finding of audio amplifiers and graphic equalisers, colour and LCD TVs, CD/DVD players, tape recorders, UPS and DTH systems, printers, scanners, microwave ovens, telephones, and fax machines. The practical exam is conducted by a team of two external evaluators; each student is allotted two experiments and may perform any one, and must submit a connection diagram and equipment list before beginning. Read our guide on how to stay calm and focused on exam day, the same composure strategies apply directly to practical viva situations. 

How to Study Class 12 Electronics Technology Effectively

• Treat Unit 1 (Safety) as a scoring unit and learn the precautions and procedures thoroughly, use the first 30 minutes of every study session for active recall of definitions and procedures
• Practise drawing and labelling block diagrams for recorders, the TV system, and each modern appliance
• Build a fault-finding habit: for every system, know the common faults and the stage-by-stage tracing steps
• Keep a neat practical file with connection diagrams, equipment lists, and observations from day one
• Get hands-on with TV trainers, CD/DVD and tape systems, and appliance kits before the practical exam
• Revisit CBSE Electronics Class 11 device fundamentals when a Class 12 system builds on them, our guide on how to revise Class 11 while studying Class 12 walks through this balancing act
• Keep Employability Skills (Part A, Level IV) in regular revision, as it is scoring and common to all skill subjects
• Understand why the brain forgets what you study and build a spaced revision cycle into your schedule from the start
• Read about how to help students stay motivated in Class 11 and 12 for sustaining effort through a heavily practical-assessed final year

Consistency and hands-on confidence matter most, since the final year is assessed heavily on practical competence.

Download Syllabus & Study Resources

Students can access essential resources to strengthen their preparation:

• Latest CBSE Class 12 Electronics Technology Syllabus PDF
• Unit-wise notes and block diagram sheets
• Practical experiment guides and viva question sets

Conclusion

For structured guidance, explore Giraffe Learning's CBSE coaching in Bangalore and read about top CBSE coaching centres in Bangalore to compare your options. If you are also preparing for a competitive exam, read choosing between JEE, NEET, and CET to plan how your skill subject fits into the bigger picture.