Mag Elec
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Magnets come in different shapes and sizes with north and south poles, and magnetic field lines travel between poles. When a magnet is moved inside a coil of wire, it generates electric current due to the magnet's effect on electrons in the wire. The document discusses magnets, their properties, how they generate electric currents, and assigns students to work in groups to research magnets and develop questions to share with the class.
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Magnets
Magnets can be natural or artificial. Natural magnets occur in nature and have a weak magnetic field, while artificial magnets are man-made and have a stronger field. Magnets have two poles, north and south, where attraction is strongest. Unlike poles attract and like poles repel. Magnets can be used for many purposes, such as in speakers, motors, generators, and compasses. They work by aligning the magnetic domains in metals and can be made by stroking or using electricity to orient the domains.
Magnetism
The first known magnet was a naturally occurring lodestone ore. Lodestone attracts iron and orients itself north-south when suspended. Natural magnets are found in nature, while artificial magnets are made by rubbing iron with lodestone. A magnetic compass uses a magnetized pointer to indicate north-south direction based on Earth's magnetic field. Magnets have attractive and directive properties with north and south poles that attract and repel each other. Earth's magnetic field is evidenced by a compass needle's orientation and iron's magnetization underground.
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This document discusses magnets and magnetism. It begins by describing how magnets were discovered and the different types of magnets. It then explains what magnets are, the two types (natural and artificial), and provides examples of natural magnets. The document also outlines some common uses of magnets in compasses, factories, hospitals, phones, and separating materials. Additionally, it describes the key properties of magnets including their attraction and alignment. The document concludes by discussing magnetic and non-magnetic materials, defining terms like magnetism, magnetic fields, and magnetic poles, and providing some safety measures for storing magnets.
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The document discusses the properties of iron and magnets at the particle level. It asks questions about what iron particles look like, how iron is attracted to magnets, what magnets are made of, and how to preserve a bar magnet long-term. It prompts the reader to draw diagrams of magnetic fields with arrows and labels to illustrate the alignment of iron particles when brought near a magnet.
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Magnets have several key characteristics:
- They attract certain metals like iron and steel but not all metals or non-metals.
- The attraction is strongest at the poles or ends of the magnet.
- When freely suspended, a magnet will orient itself along a north-south axis.
- Like poles of two magnets repel each other while opposite poles attract.
Magnets
Iron particles are lined up when a magnet is brought close to iron. When two bar magnets are placed close together with the same poles facing, they will repel each other. The magnetic field consists of field lines that emerge from the North pole and reenter at the South pole. Magnets are made of iron, nickel, or cobalt. Magnetic materials such as iron and steel are attracted to magnets, while non-magnetic materials like plastic and wood are not. To preserve a bar magnet, it should be stored with another magnet to maintain its magnetic field.
Magnet by dr.nidhi
Intro,History,Properties,Types ,Difference between Bar &Electro magnet,magnetic lines of force and uses of electromagnetism
Magnets
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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Magnets
Magnets can be natural or artificial. Natural magnets occur in nature and have a weak magnetic field, while artificial magnets are man-made and have a stronger field. Magnets have two poles, north and south, where attraction is strongest. Unlike poles attract and like poles repel. Magnets can be used for many purposes, such as in speakers, motors, generators, and compasses. They work by aligning the magnetic domains in metals and can be made by stroking or using electricity to orient the domains.
Magnetism
The first known magnet was a naturally occurring lodestone ore. Lodestone attracts iron and orients itself north-south when suspended. Natural magnets are found in nature, while artificial magnets are made by rubbing iron with lodestone. A magnetic compass uses a magnetized pointer to indicate north-south direction based on Earth's magnetic field. Magnets have attractive and directive properties with north and south poles that attract and repel each other. Earth's magnetic field is evidenced by a compass needle's orientation and iron's magnetization underground.
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This document discusses magnets and magnetism. It begins by describing how magnets were discovered and the different types of magnets. It then explains what magnets are, the two types (natural and artificial), and provides examples of natural magnets. The document also outlines some common uses of magnets in compasses, factories, hospitals, phones, and separating materials. Additionally, it describes the key properties of magnets including their attraction and alignment. The document concludes by discussing magnetic and non-magnetic materials, defining terms like magnetism, magnetic fields, and magnetic poles, and providing some safety measures for storing magnets.
Magnet 2
The document discusses the properties of iron and magnets at the particle level. It asks questions about what iron particles look like, how iron is attracted to magnets, what magnets are made of, and how to preserve a bar magnet long-term. It prompts the reader to draw diagrams of magnetic fields with arrows and labels to illustrate the alignment of iron particles when brought near a magnet.
Interactions c1 magnets & their characteristics
Magnets have several key characteristics:
- They attract certain metals like iron and steel but not all metals or non-metals.
- The attraction is strongest at the poles or ends of the magnet.
- When freely suspended, a magnet will orient itself along a north-south axis.
- Like poles of two magnets repel each other while opposite poles attract.
Magnets
Iron particles are lined up when a magnet is brought close to iron. When two bar magnets are placed close together with the same poles facing, they will repel each other. The magnetic field consists of field lines that emerge from the North pole and reenter at the South pole. Magnets are made of iron, nickel, or cobalt. Magnetic materials such as iron and steel are attracted to magnets, while non-magnetic materials like plastic and wood are not. To preserve a bar magnet, it should be stored with another magnet to maintain its magnetic field.
Magnet by dr.nidhi
Intro,History,Properties,Types ,Difference between Bar &Electro magnet,magnetic lines of force and uses of electromagnetism
Magnets
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.
Magnet 1
Magnets are made of iron, nickel, cobalt, or steel. To preserve a bar magnet, you should store it with another magnet pointing in the opposite direction to maintain its magnetic field. When a magnet breaks, its magnetic field also breaks into smaller magnetic fields. An electromagnet generates a magnetic field through a coil of wire when electric current passes through; placing an iron core in the coil makes the magnetic field stronger. Materials like iron, nickel, and cobalt are magnetic, while materials like aluminum, copper, glass, plastic, wood, and silver are non-magnetic.
Magnets
Magnets are materials or objects that produce magnetic fields and attract ferromagnetic materials like iron. Permanent magnets are made from "hard" ferromagnetic materials that maintain their own magnetic fields. Common uses of magnets include speakers, medical imaging devices, compasses, magnetic storage media, and toys. There are several types of permanent magnets including neodymium iron boron, samarium cobalt, alnico, and ferrite magnets.
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The document discusses the properties of magnetic and non-magnetic materials. Magnetic materials like iron, steel, and nickel are attracted to magnets, while non-magnetic materials like gold, aluminum, silver, copper, and non-metals are not. All magnets have two poles, a north pole and a south pole, and their attraction is strongest at the poles. Magnets orients themselves with their north pole pointing north and their south pole pointing south. Like poles repel each other while unlike poles attract. Overheating, dropping, or hammering magnets can weaken them over time.
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The document discusses several laws and concepts related to magnetism. It states that like poles of magnets repel each other, while unlike poles attract. A compass arrow points to magnetic north. Induced magnetism explains how magnetic materials can become magnetized when placed near a magnet due to magnetic induction. A magnetic field is the region around a magnet where its magnetic effects can be detected, with field lines running from the north to south pole. Permanent magnets made of steel retain their magnetism while temporary magnets made of iron lose theirs over time.
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Magnets exhibit magnetic fields that can attract or repel other magnetic materials and other magnets. Magnets have north and south poles, and opposite poles attract while like poles repel. Only certain metals like iron, nickel, and cobalt are magnetic, as they are attracted to magnets, while other metals like aluminum and copper are not magnetic and are not attracted. Magnets can be used to attract items like paperclips or separate different types of materials.
Summary fun with magnets
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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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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This document discusses different types of magnets including natural and artificial magnets. Natural magnets are obtained directly from nature while artificial magnets are prepared by humans using elements like iron, cobalt, or nickel. It also describes the general properties of magnets including that they have two poles (north and south poles) and opposite poles attract while like poles repel. Applications of magnetism are discussed such as maglev trains which use magnetic levitation to move fast without wheels touching rails. The document also explains how the Earth itself acts as a giant magnet and was discovered to have magnetic poles by William Gilbert, known as the "Father of Magnetism".
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Magnets are made of iron, nickel, cobalt, or steel. To preserve a bar magnet, you should store it with another magnet pointing in the opposite direction to maintain its magnetic field. When a magnet breaks, its magnetic field also breaks into smaller magnetic fields. An electromagnet generates a magnetic field through a coil of wire when electric current passes through; placing an iron core in the coil makes the magnetic field stronger. Materials like iron, nickel, and cobalt are magnetic, while materials like aluminum, copper, glass, plastic, wood, and silver are non-magnetic.
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The document discusses the properties of magnetic and non-magnetic materials. Magnetic materials like iron, steel, and nickel are attracted to magnets, while non-magnetic materials like gold, aluminum, silver, copper, and non-metals are not. All magnets have two poles, a north pole and a south pole, and their attraction is strongest at the poles. Magnets orients themselves with their north pole pointing north and their south pole pointing south. Like poles repel each other while unlike poles attract. Overheating, dropping, or hammering magnets can weaken them over time.
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• Magnetic Compass
• Difference between Permanent and Temporary Magnet
• Important Definitions
• Worksheet
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Magnetism is the force of attraction or repulsion between two substances. Ancient sailors used magnetite, the first known magnetic rock, as a compass by tying a piece to a string and suspending it to determine directions. Atoms have magnetic properties due to their spinning electrons and electric charge, but in most objects the magnetic domains of atoms are not uniformly aligned, resulting in weak magnetic forces. Strong magnetism can be induced by exposing objects to magnetic fields, which causes atomic domains to align uniformly. The first natural magnets were formed when iron-containing volcanic magma was magnetized by contact with the Earth's magnetic field.
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The document discusses several laws and concepts related to magnetism. It states that like poles of magnets repel each other, while unlike poles attract. A compass arrow points to magnetic north. Induced magnetism explains how magnetic materials can become magnetized when placed near a magnet due to magnetic induction. A magnetic field is the region around a magnet where its magnetic effects can be detected, with field lines running from the north to south pole. Permanent magnets made of steel retain their magnetism while temporary magnets made of iron lose theirs over time.
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This document describes different types of magnet shapes including U-shaped, ring, horseshoe, circular, bar, and cylindrical magnets. It notes that while some shapes look similar, they are different. The document also discusses magnetic poles, explaining that magnets have two poles and will attract when poles are opposite, but repel when poles are the same.
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Presentation is on explaining concept of magnetism to kids of primary & secondary standards. The PPT is based on magnetism concepts covered in CBSE syllabus.
It helps kids to understand the concept in detail and if its coupled with few practical examples, it will be more fun.
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This document defines key terms related to magnets and magnetism. It explains that magnets have north and south poles and attract iron, cobalt, and nickel. The magnetic field lines run from the north to south pole. There are natural and artificial magnets. Electromagnets are created when electric current passes through a coil of wire wrapped around an iron core, inducing magnetism. The Earth's magnetic field is believed to originate from circulating currents in its iron-rich liquid outer core.
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Magnets exhibit magnetic fields that can attract or repel other magnetic materials and other magnets. Magnets have north and south poles, and opposite poles attract while like poles repel. Only certain metals like iron, nickel, and cobalt are magnetic, as they are attracted to magnets, while other metals like aluminum and copper are not magnetic and are not attracted. Magnets can be used to attract items like paperclips or separate different types of materials.
Summary fun with magnets
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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Magnetism and magnetic levitation trains are discussed. There is some discussion of implementing maglev trains in parts of the US. Three methods of magnetic levitation are described: 1) Using magnets on the track and train results in repulsion and levitation but unstable equilibrium. 2) AC levitation uses an AC electromagnet on the train and metal tracks but energy decays quickly. 3) Dynamic levitation uses a magnet on the train and metal tracks, producing the least energy dissipation by allowing the train to move fast enough initially.
Webers theory
Weber's theory of magnetism from 1852 proposes that all molecules in magnetic substances are themselves tiny magnets with a north and south pole. In an unmagnetized state, these molecular magnets are randomly arranged. Magnetization occurs when an external magnetic field aligns the majority of the molecular magnets, with their north poles pointing in one direction and south poles in the other, giving the substance its overall magnetic properties. The theory explains magnetic behavior in terms of thermal motion disrupting the alignment of molecular magnets at higher temperatures.
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There are two types of magnets: permanent magnets that retain magnetic fields indefinitely, and temporary magnets that lose magnetic field strength over time or can be turned on and off. Materials that are naturally magnetic include iron oxide (magnetite/hematite) and some transition metals like iron, nickel, and cobalt. Electromagnets are temporary magnets that become magnetic under the influence of an electric current and are no longer magnetic when the current stops.
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This document discusses different types of magnets. It explains that natural magnets occur naturally without artificial means, while artificial magnets are substances that are given magnetic properties through artificial means like iron or cobalt. Magnetic substances are strongly attracted to magnets and can be converted into artificial magnets. The document also describes how a magnetic compass uses a magnet's poles to point toward geographic north and south, aiding in navigation.
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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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This document discusses different types of magnets including natural and artificial magnets. Natural magnets are obtained directly from nature while artificial magnets are prepared by humans using elements like iron, cobalt, or nickel. It also describes the general properties of magnets including that they have two poles (north and south poles) and opposite poles attract while like poles repel. Applications of magnetism are discussed such as maglev trains which use magnetic levitation to move fast without wheels touching rails. The document also explains how the Earth itself acts as a giant magnet and was discovered to have magnetic poles by William Gilbert, known as the "Father of Magnetism".
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Electric Current and Magnetism
The Nature of Magnetism: Electricity’s Silent Partner
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 of MAGNETIC EFFECT OF CURRENT
This document provides an introduction to the magnetic effects of electric current. It discusses:
1. Oersted's experiment in 1820 which established that electric current produces a magnetic field. When a current-carrying wire is placed near a magnetic compass needle, the needle deflects perpendicular to both the current and the needle.
2. Several rules for determining the direction of magnetic fields produced by currents, including Ampere's swimming rule, Maxwell's corkscrew rule, and the right hand thumb rule.
3. Key properties of magnets such as their attraction/repulsion behavior and the representation of magnetic field lines. Magnetic fields are produced not just by magnets but also by any moving electric charge
MagnetsNOTE23.9.pptx
The document discusses the characteristics and behaviors of magnets. It will teach that magnets can attract and repel each other and other materials, have poles, and are usually made of iron. Key points are that opposite poles attract each other due to magnetic force, while like poles repel each other. Experiments are described where magnets are placed together with different pole orientations.
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.
M A G N E T I S M
1. The document summarizes an experiment on magnetism conducted with primary school students. It explores the properties of magnets and magnetic materials through hands-on activities and observations.
2. Key findings include that iron, steel, and nickel are magnetic, while the strength of magnetism depends on the type of magnet. Magnetic poles of unlike names attract, while like poles repel.
3. The earth itself behaves like a large magnet, with magnetic north and south poles that cause compasses to point north-south and align the direction of homemade compasses.
Magnetic Mystery
Magnets can attract or repel other magnets and attract certain materials like iron. Students will perform experiments to test these magnetic properties and determine which pole is north or south on magnets. They will place labels on the magnets once identified and record their results. The experiments involve using magnets to attract or repel each other when labeled north and south, and testing different materials to see which are magnetic or not. Students will answer questions in their science journal about their observations and whether their initial predictions were correct.
Physics 25 - Simple phenomena of magntism.pptx
This document outlines learning objectives and concepts about magnetism. It describes the properties of magnets including that they have magnetic fields and two poles. It explains how magnets can magnetize other magnetic materials like iron and steel. The document distinguishes between magnetic and non-magnetic materials. It also describes magnetic fields and how to observe field lines. Methods of magnetization and demagnetization are outlined. The properties of permanent magnets and electromagnets are compared, noting that electromagnets can be turned on and off by electricity.
Physics 5.1 - Simple phenomena of magntism.pptx
This document provides an overview of magnetism and magnetic fields. It describes the properties of magnets, including that they have north and south poles and magnetic fields around them. Magnetic materials can be magnetized and are attracted to magnets, while non-magnetic materials are not. The document explains how magnetism works on an atomic level and how magnetic fields can be visualized using iron filings or a plotting compass. It also discusses electromagnets and the Earth's magnetic field.
Power point magnetic force firman gilbert metta
The document discusses concepts related to magnets including:
- Metals like iron, nickel, and cobalt have strong magnetic properties. Steel contains iron and carbon, while stainless steel contains chromium and nickel to prevent rusting.
- Magnets are made of materials that can attract or repel each other, with most magnets made of steel or mixtures like alnico containing aluminum, nickel, and cobalt.
- There are three main types of magnets: horseshoe, rod, and bar magnets, which have different magnetic force strengths. Magnets have north and south poles that attract or repel depending on their orientation.
- Magnetic fields can be observed using iron filings or a compass, with the strongest force
Power point magnetic force firman gilbert metta
The document discusses concepts related to magnets including:
- Metals like iron, nickel, and cobalt have strong magnetic properties. Steel contains iron and carbon, while stainless steel contains chromium and nickel to prevent rusting.
- Magnets are made of materials that can attract or repel each other, with most magnets made of steel or mixtures like alnico containing aluminum, nickel, and cobalt.
- There are three main types of magnets: horseshoe, rod, and bar magnets, which have different magnetic force strengths. Magnets have north and south poles that attract or repel depending on their orientation.
- Magnetic fields can be observed using iron filings or a compass, with the strongest force
simple phenomena of magnetism
This document discusses the basic properties and phenomena of magnetism. It describes how magnets have magnetic fields and two poles (north and south) that attract or repel each other. Magnetic materials like iron and steel can be magnetized by magnets, while non-magnetic materials are unaffected. The magnetic fields of magnets can be visualized using iron filings or a plotting compass. The Earth also has a magnetic field like a bar magnet. Electromagnets produce magnetic fields when electric currents flow through their coils, unlike permanent magnets.
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.
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Interactive textbook ch. 18 sec 1 magnets & magnetism
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Mag Elec
- 1. Pa Ly Magnets & Electricity