Relationship between:-, Classification of Magnetic Materials: Magnetic materials are broadly classified as- a) Diamagnetic- Those substances which develope feeble magnetisation in the opposite direction of the magnetising field.
Principles Of Condensed Matter Physics Notes Download Now CBSEPrinciples Of Condensed Matter Physics Notes Download In MyCBSEguideDownload Now CBSE Class 12 Physics Chapter 5 Magnetism and Matter notes in PDF are available for free download in myCBSEguide mobile app.The best app for CBSE students now provides Magnetism and Matter class 12 Notes latest chapter wise notes for quick preparation of CBSE board exams and school-based annual examinations.
![]() Magnetism and Matter class 12 Notes Physics Download CBSE class 12th revision notes for chapter 5 Magnetism and Matter in PDF format for free. Download revision notes for Magnetism and Matter class 12 Notes and score high in exams. These are the Magnetism and Matter class 12 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter 4 in minutes. Revision notes in exam days is one of the best tips recommended by teachers during exam days. Download Revision Notes as PDF CBSE Class 12 Physics Revision Notes Chapter 5 Magnetism and Matter Properties of magnets:- Attractive property Directive property:- Magnetic materials tend to point in the north-south direction. Magnetic poles cannot be isolated i.e. Magnetic induction:- A magnet induces magnetism in a magnetic substance placed near it. Magnetic field lines:- It is defined as the curve the tangent to which at any point gives the direction of the magnetic field at that point. Magnetic dipole:- An arrangement of two equal and opposite magnetic poles separated by a small distance is called a magnetic dipole. Magnetic dipole moment:- It is defined as the product of its pole strength and magnetic length. When a bar magnet of dipole moment is placed in a uniform magnetic field, then- e) Its potential energy is where we choose the zero of energy at the orientation when is perpendicular to. Consider a bar magnet of size and magnetic moment, at a distance r from its mid point, where r l, the magnetic field due to this bar is- On the axial point of the dipole (end-on position):- On the equatorial point of the dipole (broadside-on position):- Current loop as a magnetic dipole:-, where I current flowing in the loop and A area of the loop Gausss Law for Magnetism: It states that the net magnet flux through any closed surface is zero. Principles Of Condensed Matter Physics Notes Free Space ConstantAnalogy between electric and magnetic dipoles:- Earths magnetic field:- Physical Quantity Electrostatic Magnetism Free Space Constant Dipole Moment Axial Field Equatoral Field Torque in External Field P.E. In External Field Poles: a) The pole near the geographic north pole of the earth is called the magnetic south pole. Elements of the Earths Magnetic Field: Three quantities are needed to specify the magnetic field of the earth on its surface- a) The horizontal component of earths magnetic field (B H )- It is the component of the earths total magnetic field in the horizontal direction in the magnetic meridian. These are known as the elements of the earths magnetic field. Neutral point:- It is the point where the magnetic field due to a magnet is equal and opposite to the horizontal component of earths magnetic field. Magnetic Intensity or Magnetising field intensity:- The ability of magnetising field to magnetise a material medium. Let a material placed in an external magnetic field, The magnetic intensity is, Magnetic induction:- It is defined as the total number of magnetic lines of force crossing per unit area normally through a material. I ntensity of magnetization:- It is defined as the dipole moment per unit volume, then the magnetic field in the material will be- Magnetic permeability ( ):- It is defined as the ratio of its magnetic induction B to the magnetic intensity H. Relative permeability ( ):- It is defined as the ratio of the permeability of the medium to the permeability of free space. Magnetic susceptibility ( ):- It is defined as the ratio of the intensity of magnetisation M to the magnetising field intensity H.
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