8. Magnetic fields
... Many historians of science believe that the compass, which uses a magnetic needle, was used in China as early as the 13th century BC, its invention being of Arabic or Indian origin. The early Greeks knew about magnetism as early as 800 BC. They discovered that the stone magnetite (Fe3O4) attracts pi ...
... Many historians of science believe that the compass, which uses a magnetic needle, was used in China as early as the 13th century BC, its invention being of Arabic or Indian origin. The early Greeks knew about magnetism as early as 800 BC. They discovered that the stone magnetite (Fe3O4) attracts pi ...
Magnetism - effinghamschools.com
... • Drop the paperclips. Try to pick up one with another to see if they are still magnetic. ...
... • Drop the paperclips. Try to pick up one with another to see if they are still magnetic. ...
Magnetism & Electromagnetism
... Coulomb's Law of Magnetism The magnitude of the electrostatic force ...
... Coulomb's Law of Magnetism The magnitude of the electrostatic force ...
Unit 6 Magnetism
... • Groups of atoms with aligned magnetic poles are called magnetic domains • This allows the object to behave like a magnetic with a north and south pole • Ex: Placing a magnet against an iron nail will cause all the atoms to orient themselves in the same direction and temporarily cause the nail to a ...
... • Groups of atoms with aligned magnetic poles are called magnetic domains • This allows the object to behave like a magnetic with a north and south pole • Ex: Placing a magnet against an iron nail will cause all the atoms to orient themselves in the same direction and temporarily cause the nail to a ...
Magnetism
... bar magnet will always it always comes to rest in a north south direction. The end pointing north is called a north pole. ...
... bar magnet will always it always comes to rest in a north south direction. The end pointing north is called a north pole. ...
Name: Notes - 23-1-23-2 Induction, Flux and Faraday`s Law 1. When
... Notes - 23-1-23-2 Induction, Flux and Faraday’s Law 1. When generating power, the voltage/potential difference is known as ___________________________________________. 2. The basic process of generating emfs and, hence, currents with magnetic fields is known as ___________________. 3. It is the chan ...
... Notes - 23-1-23-2 Induction, Flux and Faraday’s Law 1. When generating power, the voltage/potential difference is known as ___________________________________________. 2. The basic process of generating emfs and, hence, currents with magnetic fields is known as ___________________. 3. It is the chan ...
File
... In Science 10 we learned that certain objects called magnets can exert a force on iron and other ferromagnetic materials such as cobalt, nickel, and gadolinium. Magnets are made of ________________ materials, usually iron, and have special properties at the atomic level, which allow them to be magne ...
... In Science 10 we learned that certain objects called magnets can exert a force on iron and other ferromagnetic materials such as cobalt, nickel, and gadolinium. Magnets are made of ________________ materials, usually iron, and have special properties at the atomic level, which allow them to be magne ...
Today: Oscilloscope and Faraday’s Law
... Last week we put a voltage on a coil of wire. The resulting current in the coil made it act like a magnet. In other words a current can produce an magnetic field – evidence that electricity and magnetism are connected. Q. Can a magnetic field produce a current? A. Yes… but it is not as easy. A const ...
... Last week we put a voltage on a coil of wire. The resulting current in the coil made it act like a magnet. In other words a current can produce an magnetic field – evidence that electricity and magnetism are connected. Q. Can a magnetic field produce a current? A. Yes… but it is not as easy. A const ...
General Science Mr. Tiesler Magnetism Test Study Guide
... Moving electric charges produce magnetic force and moving magnets produce electric force. Galvanometers detect electric current using a solenoid. A commutator is also called a reversing switch. It reverses the direction of the current in an electromagnet. Electromagnets convert electrical en ...
... Moving electric charges produce magnetic force and moving magnets produce electric force. Galvanometers detect electric current using a solenoid. A commutator is also called a reversing switch. It reverses the direction of the current in an electromagnet. Electromagnets convert electrical en ...
magnetic fields
... where the magnetic effect is strongest. One pole of a magnet points towards magnetic north of the earth and is labeled north. The other pole is labeled south. Although magnetic forces are strongest at the poles of a magnet, they are not limited to the poles alone. Magnetic forces are felt around the ...
... where the magnetic effect is strongest. One pole of a magnet points towards magnetic north of the earth and is labeled north. The other pole is labeled south. Although magnetic forces are strongest at the poles of a magnet, they are not limited to the poles alone. Magnetic forces are felt around the ...
electricity & magnetism
... A dipole is a pair of electrical charges or magnetic poles of equal magnitude but opposite polarity, separated by some (usually small) distance. The direction of the dipole moment corresponds to the direction from the negative to the positive charge or from the south to the north pole. Permanent mag ...
... A dipole is a pair of electrical charges or magnetic poles of equal magnitude but opposite polarity, separated by some (usually small) distance. The direction of the dipole moment corresponds to the direction from the negative to the positive charge or from the south to the north pole. Permanent mag ...
Script: How is electricity produced
... So simple electric generators found in power plants contain magnets and copper wire that when put into motion relative to one another create the electric current that is sent out to homes. What do magnets have to do with electricity? ...
... So simple electric generators found in power plants contain magnets and copper wire that when put into motion relative to one another create the electric current that is sent out to homes. What do magnets have to do with electricity? ...
magnetic - Timber Ridge Elementary
... Earth’s Poles In our planet we have the North and South Poles. Earth acts like a giant magnet and is surrounded by a magnetic field. Earth’s magnetic field is what causes the needle of a compass to point in different directions and causes the poles of a magnet to point either North or South. ...
... Earth’s Poles In our planet we have the North and South Poles. Earth acts like a giant magnet and is surrounded by a magnetic field. Earth’s magnetic field is what causes the needle of a compass to point in different directions and causes the poles of a magnet to point either North or South. ...
magnetismintrowebquest8word
... The following webpage (and the pages that follow by hitting the “next” button) contain good information about the source and properties of magnetism http://www.ndted.org/EducationResources/CommunityCollege/MagParticle/Physics/Magnetism.htm 1) What causes magnetism inside the atom? 2) Why are unpaire ...
... The following webpage (and the pages that follow by hitting the “next” button) contain good information about the source and properties of magnetism http://www.ndted.org/EducationResources/CommunityCollege/MagParticle/Physics/Magnetism.htm 1) What causes magnetism inside the atom? 2) Why are unpaire ...
Ferrofluids - SRJC | Santa Rosa Junior College
... • It’s a liquid magnet. • A fluid in which fine particles of iron, magnetite or cobalt are suspended in an oil surfactant. ...
... • It’s a liquid magnet. • A fluid in which fine particles of iron, magnetite or cobalt are suspended in an oil surfactant. ...
Magnet
A magnet (from Greek μαγνήτις λίθος magnḗtis líthos, ""Magnesian stone"") is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other ferromagnetic materials, such as iron, and attracts or repels other magnets.A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. An everyday example is a refrigerator magnet used to hold notes on a refrigerator door. Materials that can be magnetized, which are also the ones that are strongly attracted to a magnet, are called ferromagnetic (or ferrimagnetic). These include iron, nickel, cobalt, some alloys of rare earth metals, and some naturally occurring minerals such as lodestone. Although ferromagnetic (and ferrimagnetic) materials are the only ones attracted to a magnet strongly enough to be commonly considered magnetic, all other substances respond weakly to a magnetic field, by one of several other types of magnetism.Ferromagnetic materials can be divided into magnetically ""soft"" materials like annealed iron, which can be magnetized but do not tend to stay magnetized, and magnetically ""hard"" materials, which do. Permanent magnets are made from ""hard"" ferromagnetic materials such as alnico and ferrite that are subjected to special processing in a powerful magnetic field during manufacture, to align their internal microcrystalline structure, making them very hard to demagnetize. To demagnetize a saturated magnet, a certain magnetic field must be applied, and this threshold depends on coercivity of the respective material. ""Hard"" materials have high coercivity, whereas ""soft"" materials have low coercivity.An electromagnet is made from a coil of wire that acts as a magnet when an electric current passes through it but stops being a magnet when the current stops. Often, the coil is wrapped around a core of ""soft"" ferromagnetic material such as steel, which greatly enhances the magnetic field produced by the coil.The overall strength of a magnet is measured by its magnetic moment or, alternatively, the total magnetic flux it produces. The local strength of magnetism in a material is measured by its magnetization.