Inside A Magnet
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The document discusses magnetism at the atomic level. It explains that magnetic domains are groups of atoms whose magnetic fields are aligned, allowing some materials to become magnetized when most or all domains are similarly oriented. It provides examples of ferromagnetic materials like iron and cobalt that strongly exhibit magnetism due to aligned domains. Magnets can be made by placing unmagnetized ferromagnetic materials in strong magnetic fields or by rubbing them with magnet poles, and can be destroyed by impacts, heating, or breaking them into smaller magnet pieces.
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Magnets can be natural or artificial. Natural magnets are made of magnetite, an iron ore with magnetic properties. Artificial magnets are made from iron, nickel, or cobalt. Magnets have different shapes like bar, horseshoe, cylindrical, or ball. They attract iron, nickel, and cobalt. Magnets have north and south poles and can attract or repel each other depending on whether the poles are opposite or the same.
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1. 1. Magnetism Name Of Student..
2. 2. Sub-Heading 1.) Magnet Definition. 2.) How Magnet Works. 3.) Coulomb Law Of Magnetic Force. 4.) Magnetism. 5.) Explanation Of Magnetism. 6.) Magnetic Field. 7.) What Happens If We Broke Magnet. 8.) Magnetic Domains. 9.) Magnetizing Material. 10.) Types Of Magnetism.
3. 3. Definition: Magnets:- A magnet is any material that produces a magnetic force (Push or Pull) on a magnetic material ( such as iron etc ). E.G:-
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The document discusses magnets and magnetic materials. It defines a magnet as an object that attracts magnetic materials like iron, nickel, and cobalt. It describes how magnets were first discovered by an ancient Greek shepherd and outlines the different types of natural and artificial magnets. The document explains that magnets have north and south poles and that like poles repel while unlike poles attract. It also discusses how magnets are used in compasses to find directions and how to make your own magnet by rubbing an iron piece with a permanent magnet. Finally, it provides tips for properly storing bar and horseshoe magnets.
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Magnets have been known and used for navigation for centuries, with the ancient Greeks using a magnetic stone called magnetite. Magnetism is the force of attraction or repulsion between magnetic materials due to the arrangement of electrons in their atoms. The Earth itself acts as a large magnet, with a magnetic field strongest at its north and south magnetic poles. Other planets and the Sun also have magnetic fields extending into space.
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Magnets produce magnetic fields and attract ferromagnetic materials like iron. There are permanent magnets, which maintain their magnetism, and electromagnets, which are temporarily magnetic when near an electric current. The strongest permanent magnets are made from neodymium alloy and have high remanence and coercivity, allowing them to maintain strong magnetic fields.
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There are two methods for making magnets: the stroking method and the electrical method. The stroking method involves stroking an object like an iron nail multiple times with a magnet in the same direction. The electrical method involves coiling wire around an iron nail and connecting the wire to a battery, creating an electromagnet. Both methods magnetize the object through repeated magnetic or electrical interactions.
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Magnetism is a force that can attract or repel magnetic materials like iron. It is a property of substances that are attracted to magnets. There are different types of magnetism including permanent magnetism, temporary magnetism caused by magnetic fields, and electromagnetism related to electric currents and changing magnetic fields. Magnets have north and south poles and attract unlike poles while repelling like poles. The strength of magnetic force depends on the strength of the magnets and the distance between them.
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- Testing a magnet involves bringing each end of a specimen near the north pole of a bar magnet. Attraction indicates a magnetic material, while repulsion indicates a permanent magnet.
- Induced magnetism occurs when an unmagnetized magnetic material like iron becomes magnetized upon contact with a permanent magnet. However, induced magnets only maintain magnetism temporarily.
- The magnetic field is the region around a magnet where other magnetic objects experience a force. Magnetic field lines are used to represent the pattern and direction of this field.
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1. 1. Magnetism Name Of Student..
2. 2. Sub-Heading 1.) Magnet Definition. 2.) How Magnet Works. 3.) Coulomb Law Of Magnetic Force. 4.) Magnetism. 5.) Explanation Of Magnetism. 6.) Magnetic Field. 7.) What Happens If We Broke Magnet. 8.) Magnetic Domains. 9.) Magnetizing Material. 10.) Types Of Magnetism.
3. 3. Definition: Magnets:- A magnet is any material that produces a magnetic force (Push or Pull) on a magnetic material ( such as iron etc ). E.G:-
4. 4. How Magnet Works:- • Every Magnet Has Two Poles:- 1.) North Pole. 2.) South Pole. The opposite poles attract each other while same poles repel each other. E.G:-
5. 5. Coulomb Law Of Magnetic Force:- Sir Charles Augustine de Coulomb, was first to recognized the quantitatively force exerted by the magnets and he stated that:- “The magnitude of the electrostatic force of attraction between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them. The force is along the straight line joining them.” 𝐹𝑒 = 𝑘𝑞1 𝑞2 𝑟2
6. 6. Magnetism:- • Definition:- Magnetism is one aspect of the combined electromagnetic force. It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects.
7. 7. Explanation:- A magnetic field exerts a force on particles in the field due to the Lorentz Force. As Lorentz Force is defined as:- “The force which is exerted by a magnetic field on a moving electric charge.” The motion of electrically charged particles gives rise to magnetism. The force acting on an electrically charged particle in a magnetic field depends on the magnitude of the charge, the velocity of the particle, and the strength of the magnetic field.
8. 8. Magnetic Fields:- Diagram:- • The Lines around the magnet shows area of force exerted in a region around magnet. • The forces originates from the North Pole and moves towards South Pole.
9. 9. What Happens If We Broke Magnet:- • If we broke a magnet into pieces then each piece will still have its own North Pole and South Pole and each field have its own magnetic field.
10. 10. Magnetic Domains:- • The magnetic fields in the magnets is produced by the spinning of their electrons. • These spinning of electron create tiny magnetic regions which are known as Magnetic Domains. • In Other atoms these magnetic regions (Domains) cancels each other while in magnets Domains are all lined up in a same directions. • When ever all electrons spin in a same direction magnetic field is created between them.
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The document discusses the properties and uses of magnets. It describes several experiments that can be done to observe how magnets attract and repel different objects. It also explains key magnetic concepts like poles, magnetic fields, and how compasses detect the Earth's magnetic field. Permanent and temporary magnets are defined, and examples of how magnets are used in technology and medicine are provided.
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Magnetism is a property of a material that enables to attract or repel other materials. The presence and strength of the material’s magnetic properties can be observed by the effect of the forces of attraction and repulsion on other materials.
What makes magnets?
Magnets are actually created by tiny spinning electrons in an atom. The electrons move about the nucleus and spin like a top, creating a tiny magnetic field.
If electrons are spinning in the same direction there is more magnetism, while electrons spinning in opposite directions cancel out each others’ magnetic fields. Magnetic fields are invisible, we can only see the effects of the magnetic force.
Magnetic Field: The space around a magnet in which a magnetic force is exerted
— The shape of a magnetic field is revealed by magnetic field lines
Directed away from north poles and toward south poles
Magnets have two ends or poles, called north and south poles. At the poles of a magnet, the magnetic field lines are closer together.
The magnetic field lines around horse-shoe and disk magnets are closest together at the magnets’ poles. Unlike poles of magnets attract each other and like poles of magnets repel. Magnetic Poles: A region on a magnet which produces magnetic forces
The poles of a suspended magnet will align themselves to the poles of the Earth
Fundamental Rule: Like poles repel; opposite poles attract
If a force of attraction only is possible between an object and a magnet, then the object interacting with the magnet contains a ferromagnetic substance and is considered naturally magnetic.
If a force of repulsion is only between an object and a magnet, then the object interacting with the magnet may also be a permanent magnet or a temporarily magnetized ferromagnetic material.
Materials which are attracted by a magnet are known as magnetic materials. Iron, cobalt, nickel and many alloys of these metals like steel and alnico are magnetic.
Magnetic materials can be used to make permanent or temporary magnets unlike the non-magnetic materials which cannot.
INDUCED MAGNETISM
The process by which the screws become magnets is called Electric/Magnetic Induction. This same process is the reason why magnets attract non-magnetized magnetic substances such as the screw. The screw becomes an induced magnet with the end nearer the magnet having an opposite polarity to that of the permanent magnet. Hence attraction happens after magnetic induction occurs. The quicker way to know the polarity of a permanent or induced magnet is by the use of a magnetic compass. Compass needle is a small magnet that is free to pivot in a horizontal plane about an axis and that the end of the magnet that points to geographic north is called the north (N) pole. Likewise, the opposite end of the magnet is the south (S) pole.What are magnetic domains?
Magnetic substances like iron, cobalt and nickel
Introduction about magnetic material and its properties
This document discusses different types of magnetic materials and their properties. It describes paramagnetic materials as those that are weakly attracted to magnets and align in an applied magnetic field. Diamagnetic materials are repelled by magnets and align opposite to an applied field. Ferromagnetic materials are strongly attracted to magnets and can be magnetized. They retain magnetization after being placed in a field. Ferrimagnetic materials also retain magnetization like ferromagnets but have antiparallel dipoles of unequal magnitude. Antiferromagnetic materials have antiparallel alignment below a critical temperature.
Electromagnetism
The document discusses key concepts relating to electromagnetism and magnetism. It defines ferromagnetic elements as iron, nickel, cobalt, and rare earth metals that can become magnetized. Magnets are made by placing a ferromagnetic material in a strong magnetic field or by striking the material with a hammer while in a magnetic field to align magnetic domains. Magnetic domains are regions within a magnetic material where electron spins are aligned. The Earth has a magnetic field created by electric currents in its liquid outer core, and this field helps protect the planet from solar winds.
magnetism_qr.pptx
Magnets have north and south poles and are surrounded by magnetic fields, they exert attractive or repulsive forces on other magnets depending on whether the poles are opposite or alike, and an object is magnetic if the alignment of atomic domains within it create an overall magnetic field.
magnetism_qr.pptx
Magnets have north and south poles and are surrounded by magnetic fields, with the strongest forces occurring at the poles; the arrangement of atomic domains determines if a material is magnetic, with aligned domains creating magnetism; and while all magnets attract opposite poles and repel like poles, their magnetic properties can be enhanced, reduced, or changed through external influences on the domains.
Interactive textbook ch. 18 sec 1 magnets & magnetism
Magnets have two poles, north and south, and exert magnetic forces on each other and other objects. Earth itself acts like a giant magnet, with its magnetic north pole located near its geographic south pole. Materials are magnetic if their atomic domains are aligned, allowing their magnetic fields to combine. There are different types of magnets including permanent and electromagnets. Earth's rotation creates electric currents in its liquid outer core, generating the planet's magnetic field.
Andy kemagnetan(presntasi)
This document discusses the origins and types of magnets. There are two types of magnets - natural magnets and artificial magnets. Artificial magnets include hard magnets, which are strong and permanent, and soft magnets, which are weak and transient. Hard magnets are made of steel and examples include cassettes and compasses, while soft magnets are made of soft iron. The magnetic field is the region around a magnet that is still influenced by its magnetic force. Materials can be classified as ferromagnetic, paramagnetic, or diamagnetic based on their interaction with magnetism. A magnet has magnetic poles (north and south) located at its ends, connected by a magnetic axis.
Electromagnetism
The document discusses magnetism and magnets. It begins by explaining that the ancient Greeks and Romans knew that the mineral lodestone was magnetic and could attract iron. It then provides details on lodestone and other naturally magnetic materials called ferromagnets that strongly attract metals like iron. The document outlines the basic properties of magnets, including that they have north and south poles and opposite poles attract while like poles repel. It concludes by describing different types of magnets such as permanent, temporary, and electromagnets as well as their common shapes.
Magnet by dr.nidhi
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Magnetic Material
Magnetic materials can be classified into soft and hard magnetic materials. Soft magnetic materials do not retain magnetism in the absence of a magnetic field, while hard magnetic materials do retain magnetism. Examples of soft magnetic materials include iron-silicon alloys and nickel-iron alloys, while examples of hard magnetic materials include alloys of iron, cobalt and aluminum. Magnetic materials can also be classified based on their response to magnetic fields into diamagnetic, paramagnetic, ferromagnetic, ferrimagnetic, and antiferromagnetic materials.
FERROMAGNETIC AND ANTIFERROMAGNETIC MATERIALS.pptx
Ferromagnetic materials have three main characteristics:
1) They become spontaneously magnetized in the absence of an external magnetic field due to parallel alignment of magnetic moments.
2) They have a magnetic ordering temperature called the Curie temperature, above which they become paramagnetic.
3) They are used in many devices like transformers, electromagnets, and computer hard drives due to their magnetic properties.
Applied Physics, diploma, magnetism, electromagnetism
This document discusses magnetism and magnetic materials. It defines a magnet and magnetic field. It explains that magnets have north and south poles and that opposite poles attract while like poles repel. It describes different types of magnetic materials including ferromagnetic, paramagnetic, and diamagnetic materials. The document also discusses how to magnetize and demagnetize ferromagnetic materials as well as applications of magnetism such as in electromagnets and medical imaging.
MAGNETS.pptx
Magnets produce magnetic fields due to the motion of electrons within their atoms. In substances like iron, cobalt, and nickel, most electrons spin in the same direction, making the atoms strongly magnetic. There are different types of magnets including permanent magnets made of materials like cobalt, and temporary magnets that are diamagnetic, paramagnetic, or ferromagnetic. Electromagnets are another type of magnet that use electric currents to generate magnetic fields. Magnets can have different shapes that produce distinct magnetic field patterns, such as bar magnets generating field lines between their poles and ring magnets producing closed circular field lines.
Open Education Resource
This document summarizes the classification of materials based on their magnetic properties. It discusses five types of materials: diamagnetic, paramagnetic, ferromagnetic, antiferromagnetic, and ferrites. Diamagnetic materials have no magnetic dipole moment and are repelled by magnetic fields. Paramagnetic materials also have no net dipole moment but are weakly aligned by external magnetic fields. Ferromagnetic materials have a net dipole moment and are strongly attracted to magnetic fields. Antiferromagnetic materials have alternating dipole moments that cancel out, resulting in no net magnetic moment. Ferrites are ceramic materials made from iron oxides that can be easily magnetized.
Magnets in orthodontics
This power point gives a detailed information about magnets in orthodontics, basic terminology of magnets their application in orthodontics, orthodontic appliance with magnets Introduction
History,Terminologies ,Classification,Application in orthodontics(Magnetic Twin block,MAD I,MAD II, MAD III)
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Interactive textbook ch. 18 sec 1 magnets & magnetism
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