Magnetic Properties of Materials falls under Electricity and Magnetism portion of class 12 physics. Magnetic Properties of Materials Class 12 Physics Notes is designed according to the updated syllabus of 2080 and it covers all the important portion of the chapter. Students can easily prepare their notes, study for test or exams by taking the help of class 12 Magnetic Properties of Materials Notes.
Chapter – 17
Magnetic Properties of Materials
A magnet when suspended freely, aligns itself approximately along geographical NS line with one end pointing towards north of the earth and other towards south of the earth. There are two points near two ends of a magnet where most of its strength is concentrated. They are known as magnetic poles. In freely suspended position, the pole which is pointed towards geographical north is called north-pole and the other pointing towards south is called south-pole. Isolated magnetic pole does not exist. Magnetic poles always exist in pair. If a magnet is cut or broken into pieces, each piece possesses two magneticpoles-north-pole and south-pole.
Chapter Overview
In this chapter we are going to learn the following concepts, ideas or topics;
Now let’s move on to the notes of magnetic properties of materials. The PDF given below contains all the notes which includes all the topics mentioned in the chapter overview. We request students to use the notes of magnetic properties of materials wisely for the purpose of making notes and preparing for the board examination.
You have to scroll down the PDF to view all the notes of Magnetic Properties of Materials. This PDF contains 20 pages in total which contains all the required notes of waves in Pipes and string. It doesn’t contains the numerical problems so if you are searching for the numericals then you’ll find them in the next PDF given below.
Coulomb’s Law of Magnetism
Unlike magnetic poles attract each other while like magnetic poles repel each other. This force is studied by Coulomb in 1785AD and then formulated as a law known as Coulomb’s law of magnetism.The force of attraction or repulsion between two magnetic poles is:
- directly proportional to the product of their pole strengths.
- inversely proportional to the square of the distance between them.
Neutral Point
When we plot the lines of force in the magnetic field of a bar magnet, there we get a point through which none line of force pass. At this point the magnitude of the magnetic field intensity is cancelled by the earth’s horizontal magnetic field. Since at this point we have two magnetic fields, one of the given magnet and other is of earth’s magnetic field but they have neutralized each other. Hence this point is called a neutral point. When we keep a compass needle at neutral point, it does not show any particular direction since the net magnetic field at this point is zero.
Neutral point is defined as that point where the resultant of the magnetic field intensities due to magnet and earth is zero i.e. magnetic field intensity is exactly equal and opposite to the horizontal component of earth’s magnetic field. Hence any point where the net magnetic field intensity is zero though there is presence of two or more than two magnetic fields is called neutral point.
Magnetic Properties of Materials Class 12 Physics Numerical Questions
Those students who want to practice the numericals from magnetic properties of materials chapter can practice the questions given in the PDF below. We have solved the selected numericals which will provide you the method of solving the numericals.
This video contains some important numericals from magnetic properties of materials chapter. In addition to the numericals it also contains important short questions and ways of solving numericals with concepts.
If you are willing to practise more numerical problems for your examination then you can practice the questions listed below.
These questions are provided for practising purposes. So we haven’t provided the solutions of the numerical problems. However, if you are facing problems while solving these numericals then we request you to copy the questions and paste it in Google to get the solutions of that numericals. If that doesn’t work then you can contact us through our telegram channel to get the solutions.
