Get the NCERT Exemplar Class 12 Physics Chapter 7 Alternating Current PDF on this page. It is the higher-order companion to the main NCERT textbook, updated for the 2026-27 CBSE syllabus. Both downloads are free.
- CBSE Weightage: 5 to 7 marks (Class 12 Physics Boards)
- JEE Main Weightage: 3 to 4% (typically 1 to 2 questions per shift drawn from this chapter)
- NEET Weightage: 2 to 3 questions per year
How the NCERT Exemplar Class 12 Physics Chapter 7 Helps You
This page hosts the 2026-27 Exemplar print and adds the practice strategy that a raw PDF lacks.
- 2026-27 NCERT Alignment: Every problem in the 24-question set maps to a sub-topic still in the current Class 12 Physics syllabus, so you skip dropped content.
- Question-Type Inventory: A clear count of MCQ-I, MCQ-II, VSA, SA, and LA problems helps you pace each sitting.
- Self-Test Format: The book prints only problems, so you can attempt cold, mark weak ones, and return during revision week.
- JEE and NEET Crossover: Recent papers reused Exemplar setups. Working this chapter is a low-cost way to lift your Alternating Current score.
Alternating Current NCERT Exemplar Video Lecture - Class 12 Physics
Source: JEE Wallah on YouTube
What's Inside the NCERT Exemplar Class 12 Physics Chapter 7
The Exemplar runs about 7 pages with five fixed sections. The topic map below shows where each sub-topic appears so you can target your weakest area first.
| Sub-Topic Concentration | Problem Numbers |
|---|---|
| AC through resistor, inductor, capacitor | 7.1, 7.2, 7.7, 7.13, 7.18 |
| Series LCR and phasor diagrams | 7.3, 7.8, 7.14, 7.19, 7.22 |
| Resonance and quality factor Q | 7.4, 7.9, 7.15, 7.20 |
| Power in AC and power factor | 7.5, 7.10, 7.16, 7.21, 7.23 |
| Transformer and LC oscillations | 7.6, 7.11, 7.12, 7.17, 7.24 |
Alternating Current NCERT Exemplar Question-Type Breakdown
Five question types make up the 24 problems in Chapter 7. The split below shows how many of each kind you face and the indicative mark value.
| Question Type | Number of Problems | Indicative Marks Each |
|---|---|---|
| MCQ-I (single correct) | - | 1 |
| MCQ-II (one or more correct) | 6 | 2 |
| Very Short Answer (VSA) | 7 | 1 to 2 |
| Short Answer (SA) | 6 | 3 |
| Long Answer (LA) | 5 | 5 |
| Total | 24 | - |
MCQ-II is the most-failed type because at least one extra option is correct. Treat it as slow work, not a quick answer.
2026-27 Syllabus Status of Alternating Current Exemplar Problems
The NCERT Exemplar was not rationalised when the Class 12 Physics textbook was trimmed in 2023. Some problems touch sub-topics no longer in the current syllabus. Skip those during board prep. Keep them if you are targeting JEE Main or NEET.
Detailed kept-trimmed-removed table: see the breakdown on the Alternating Current Class 12 Physics NCERT Book PDF page.
Why the NCERT Exemplar Matters for JEE Main and NEET Alternating Current Prep
Three reasons to slot the Exemplar into your study plan:
- Same author body: The committees that write the NCERT textbook and the Exemplar overlap. Practising trains you on the exact phrasing CBSE markers expect.
- Five question types: Few other books cover MCQ-I, MCQ-II, VSA, SA, and LA together. The mix matches today's CBSE paper and JEE Main multiple-correct trap questions.
- Free and offline: The PDF works on any phone. Print only the pages you need without buying a private question bank.
JEE Main and NEET Alternating Current Questions Inspired by the Exemplar
Recent entrance papers reused the setup of several Exemplar problems from Class 12 Physics Chapter 7.
Full year-wise PYQ map: Alternating Current Class 12 Physics NCERT Solutions
Time-per-Question Budget for the Alternating Current Exemplar
This time map helps you plan how many sittings the chapter PDF needs. Times are for students who have finished the corresponding NCERT chapter.
| Question Type | Problems | Avg. Minutes Each | Total Time |
|---|---|---|---|
| MCQ-I and MCQ-II | 6 | 3 to 5 | ~24 min |
| VSA and SA | 13 | 5 to 8 | ~78 min |
| LA | 5 | 20 to 25 | ~110 min |
| Whole chapter | 24 | - | ~3.5 hours |
Spread the 3.5-hour load across four to five sittings. Back-to-back LA attempts cause fatigue and lead to skipped working.
Key Alternating Current Formulae Before Attempting the Exemplar
Most Exemplar problems use a small set of recurring formulas. Lock these four into memory before opening the PDF and save 30 to 40% of attempt time per problem.
| Concept | Formula |
|---|---|
| RMS voltage and current | V_rms = V_0 / sqrt(2) |
| Inductive reactance | X_L = omega L |
| Series LCR impedance | Z = sqrt(R squared + XL - XC squared) |
| Resonance frequency | omega_0 = 1 / sqrt(L C) |
Full master table: Alternating Current Class 12 Physics Formula Sheet
Alternating Current CBSE Marks Weightage Across Class 12 Physics Chapters
The chart maps the typical CBSE Class 12 Physics marks distribution across all 14 chapters, averaged over the last five board papers.
Student Feedback
"The Exemplar problems are tougher than the textbook, but working them before boards made a real difference in my Physics score." - Class 12 student
"The MCQ-II section trips most students. Practising these from Chapter 7 helped me avoid that trap in JEE Main." - JEE aspirant
Other Resources for Alternating Current Class 12 Physics Chapter 7
| Resource | Link |
|---|---|
| NCERT Solutions | Alternating Current NCERT Solutions |
| NCERT Book PDF | Alternating Current NCERT Book PDF |
| Notes | Alternating Current Notes |
| Formula Sheet | Alternating Current Formula Sheet |
| Exemplar Book PDF | Alternating Current Exemplar Book PDF |
| Exemplar Solutions | Alternating Current Exemplar Solutions |
| Handwritten Notes | Alternating Current Handwritten Notes |
NCERT Exemplar Book PDF for Class 12 Physics: All Chapters
Other Class 12 Physics NCERT Exemplar Book PDFs available as free downloads:
| Chapter | Resource |
|---|---|
| Chapter 1 | Electric Charges and Fields Exemplar Book PDF |
| Chapter 2 | Electrostatic Potential and Capacitance Exemplar Book PDF |
| Chapter 3 | Current Electricity Exemplar Book PDF |
| Chapter 4 | Moving Charges and Magnetism Exemplar Book PDF |
| Chapter 5 | Magnetism and Matter Exemplar Book PDF |
| Chapter 6 | Electromagnetic Induction Exemplar Book PDF |
| Chapter 7 | Alternating Current Exemplar Book PDF |
| Chapter 8 | Electromagnetic Waves Exemplar Book PDF |
| Chapter 9 | Ray Optics and Optical Instruments Exemplar Book PDF |
| Chapter 10 | Wave Optics Exemplar Book PDF |
| Chapter 11 | Dual Nature of Radiation and Matter Exemplar Book PDF |
| Chapter 12 | Atoms Exemplar Book PDF |
| Chapter 13 | Nuclei Exemplar Book PDF |
| Chapter 14 | Semiconductor Electronics Exemplar Book PDF |
NCERT Exemplar Class 12 Physics Chapter 7 - Frequently Asked Questions
Ques. Where can I download the NCERT Exemplar Class 12 Physics Chapter 7 for free?
Ans. You can download it directly from this page. Both the flipbook view and the PDF download are free and updated for 2026-27.
Ques. Is the Exemplar Book PDF aligned with the 2026-27 NCERT syllabus?
Ans. The NCERT Exemplar was not rationalised when the textbook was trimmed. Most Chapter 7 problems still map to the current 2026-27 syllabus. A small number touch dropped sub-topics and can be skipped for board prep.
Ques. How many problems are in the Class 12 Physics Chapter 7 Exemplar?
Ans. Chapter 7 has 24 HOTS problems across 7 pages, split as MCQ-I (0), MCQ-II (6), VSA (7), SA (6), and LA (5).
Ques. Can I use the Exemplar for JEE Main and NEET preparation?
Ans. Yes. JEE Main 2025 reused the LCR resonance Q-factor setup of Exemplar 7.15, and NEET 2024 mirrored Exemplar 7.16 on average AC power. Use it during your full year and revisit before the entrance exam.
Ques. Where can I find solutions to the Alternating Current Exemplar problems?
Ans. Solved answers for every problem are on the Alternating Current Class 12 Physics NCERT Exemplar Solutions page.
Comments