NCERT Solutions for Class 12 Physics Chapter 5 – Magnetism and Matter
NCERT Solutions for Class 12 Physics Chapter 5 – Magnetism and Matter deals with the magnetic properties of materials and the behaviour of magnets in fields. At Myclass24, we understand that many students find this chapter conceptually different from the previous ones — it is less calculation-heavy. Still, it demands a clear understanding of terminology, properties, and the distinctions among diamagnetic, paramagnetic, and ferromagnetic materials. Our solutions make these distinctions crisp and memorable. 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 5
The free PDF of NCERT Solutions for Class 12 Physics Chapter 5 – Magnetism and Matter is available on Myclass24 for download. Students will find all NCERT exercise solutions clearly solved, along with explanatory notes on key terms like magnetic susceptibility, permeability, and the B-H curve. The PDF is useful for quick revision and as a ready reference when studying from the textbook.
Chapter 5 – At a Glance
Detail | Information |
Chapter Name | Magnetism and Matter |
Chapter Number | 5 |
Class | Class 12 |
Subject | Physics |
Total Exercises | 2 (Exercise + Additional) |
Total Questions | 16 |
Important Topics | Bar Magnet, Earth's Magnetism, Magnetic Properties, Hysteresis, Curie's Law |
CBSE Marks Weightage | Approx. 5 marks |
PDF Available | Yes – Free Download on Myclass24 |
What is Chapter 5 – Magnetism and Matter About?
Chapter 5 begins by drawing parallels between the electric dipole and a bar magnet — treating the bar magnet as a magnetic dipole. The magnetic dipole moment, torque in an external field, and potential energy of the dipole are discussed in direct analogy with electrostatics. The magnetic field on the axial and equatorial lines of a bar magnet is derived using these analogy principles.
Earth's Magnetism is a fascinating section where students learn about the geographic and magnetic poles, magnetic declination, magnetic inclination (or dip), and horizontal component of Earth's field. These definitions are frequently tested as short-answer questions.
The chapter then explores Magnetisation and Magnetic Intensity — the response of a material to an applied magnetic field. Students are introduced to three key quantities: magnetisation (M), magnetic intensity (H), and magnetic field (B), along with their inter-relationship through permeability and susceptibility.
The classification of materials into diamagnetic, paramagnetic, and ferromagnetic is explained in terms of their response to external fields, temperature dependence, and behaviour in non-uniform fields. Curie's Law gives the temperature dependence of susceptibility for paramagnetic materials. The B-H curve (hysteresis loop) for ferromagnetic materials is discussed with its significance in choosing materials for permanent magnets versus electromagnets.
What Makes Chapter 5 Unique Compared to Other Chapters
Unlike most of Class 12 Physics, Chapter 5 is largely descriptive and definition-based. Students who rely only on numerical practice often lose marks here. The key is to understand the physical meaning of each magnetic quantity and be able to distinguish between terms like susceptibility, permeability, and retentivity clearly.
At Myclass24, our solutions emphasise the conceptual clarity of these terms and include comparison tables for the three types of magnetic materials — something that is extremely useful when writing five-mark descriptive answers in the board exam.