NCERT Solutions for Class 12 Physics Chapter 6 – Electromagnetic Induction
NCERT Solutions for Class 12 Physics Chapter 6 – Electromagnetic Induction is a chapter that truly connects the electric and magnetic worlds. At Myclass24, we give this chapter special importance because it forms the theoretical basis of electric generators, transformers, and many real-world devices. Students who understand Faraday's Laws and Lenz's Law deeply will find this chapter not just easy but genuinely interesting — and our solutions are built to get them there. Also, get subject-wise NCERT Solutions for class 12, for all chapters of Physics, check NCERT Solutions for class 12 Physics.
Find the PDF of NCERT Solutions for Class 12 Physics Chapter 6
Download the free PDF of NCERT Solutions for Class 12 Physics Chapter 6 – Electromagnetic Induction from Myclass24. The PDF contains thoroughly solved NCERT exercises with all necessary derivations, proper notation, and diagrams of coils and flux lines. It is structured for both quick exam revision and in-depth conceptual study, making it useful across the academic year.
Chapter 6 – At a Glance
Detail | Information |
Chapter Name | Electromagnetic Induction |
Chapter Number | 6 |
Class | Class 12 |
Subject | Physics |
Total Exercises | 2 (Exercise + Additional) |
Total Questions | 22 |
Important Topics | Faraday's Laws, Lenz's Law, Motional EMF, Eddy Currents, Self and Mutual Inductance |
CBSE Marks Weightage | Approx. 8 marks |
PDF Available | Yes – Free Download on Myclass24 |
What is Chapter 6 – Electromagnetic Induction About?
Chapter 6 begins with the concept of magnetic flux — the total number of magnetic field lines passing through a surface. Faraday's First Law states that any change in magnetic flux through a coil induces an EMF in it, and Faraday's Second Law gives the magnitude of this induced EMF as proportional to the rate of change of flux. These two laws underpin the entire chapter.
Lenz's Law defines the direction of the induced current — it always opposes the change in flux that caused it, which is a direct expression of conservation of energy. Students must understand this law deeply because many board-level questions ask them to determine the direction of the induced current in specific scenarios.
Motional EMF is derived for a conductor moving in a magnetic field. When a straight conductor of length 'l' moves with velocity 'v' perpendicular to a field B, the EMF induced is Blv. This concept extends to the AC generator, where rotational motion produces a sinusoidally varying EMF.
Eddy Currents — induced currents in bulk conductors due to changing flux — are discussed with their practical applications (braking in trains, induction cookers) and how their ill effects are minimised using laminated cores.
Self-Inductance and Mutual Inductance are introduced with their circuit symbols and energy interpretations. The energy stored in an inductor (similar in form to capacitor energy) and the expression for mutual inductance between two coils are standard derivation topics.
Why Electromagnetic Induction is Scoring in Board Exams
Chapter 6 has a very predictable pattern in board exams. Derivations of Faraday's Laws, motional EMF, and AC generator EMF are almost certain to appear. Lenz's Law direction-finding problems are worth two to three marks each and are straightforward once the concept is clear.
Myclass24 solutions present each derivation in a structured, step-numbered format so students can replicate the logic in the exam without missing any step. We also highlight the most common errors — like forgetting the negative sign in Faraday's equation — that cost students easy marks.
FAQs on NCERT Solutions Class 12 Physics Chapter 6 – Electromagnetic Induction
Electromagnetic induction is the phenomenon of producing an electromotive force in a conductor when the magnetic flux linked with it changes. This chapter explains how changing magnetic fields can generate electric currents without direct electrical contact. Students learn about magnetic flux, induced current, and practical applications such as generators and transformers. Understanding electromagnetic induction is important because it forms the basis of modern power generation systems. Questions involving induced emf and magnetic flux changes are commonly asked in board examinations and competitive tests.
Self-induction occurs when a changing current in a coil induces an emf within the same coil, while mutual induction occurs when a changing current in one coil induces an emf in a nearby coil. This chapter explains inductance, energy storage in magnetic fields, and applications of inductors. Students learn how these phenomena are used in transformers and electrical circuits. Understanding self and mutual induction helps explain many practical devices and improves problem-solving ability. These topics are important for board examinations because they combine theoretical understanding with numerical applications.
Faraday’s law states that the induced electromotive force in a circuit is directly proportional to the rate of change of magnetic flux linked with it. This law provides the mathematical foundation for electromagnetic induction. The chapter explains how varying magnetic fields produce electrical energy and introduces numerical problems based on flux changes. Students learn how Faraday’s law is applied in generators and electrical devices. Understanding this law helps explain the conversion of mechanical energy into electrical energy and strengthens conceptual understanding of induction phenomena.
Lenz’s law states that the induced current always flows in a direction that opposes the change producing it. This law helps determine the direction of induced current and ensures the conservation of energy. The chapter explains how Lenz’s law complements Faraday’s law and provides practical examples involving moving magnets and conductors. Students use it to solve directional problems in electromagnetic induction. Understanding Lenz’s law is essential because it explains the behavior of induced currents and appears frequently in conceptual and numerical examination questions.