Leave about 6” free before you start winding Leave 6” at the end
... North end of compass needle attracted to south pole of magnet Why can’t we feel the magnetic field? We’re not magnetic! ...
... North end of compass needle attracted to south pole of magnet Why can’t we feel the magnetic field? We’re not magnetic! ...
Magnetism
... Like magnetic poles repel Unlike magnetic poles attract A magnetic field is the area in which magnetic forces act ...
... Like magnetic poles repel Unlike magnetic poles attract A magnetic field is the area in which magnetic forces act ...
Magnet and Magnetism What Causes Magnetism Hard and Soft
... A magnet is a rock or a piece of metal that can pull certain types of metal toward itself. The force of magnets, called magnetism, is a basic force of nature, like electricity and gravity. Magnetism works over a distance. This means that a magnet does not have to be touching an object to pull it. ...
... A magnet is a rock or a piece of metal that can pull certain types of metal toward itself. The force of magnets, called magnetism, is a basic force of nature, like electricity and gravity. Magnetism works over a distance. This means that a magnet does not have to be touching an object to pull it. ...
File
... ground. We use this technology to operate large cranes that lift heavy metal objects, such as cars. Electromagnets are also used to make motors run in small appliances. Combining regular magnets and electromagnets makes it possible for electrical energy to be turned into energy of motion. ...
... ground. We use this technology to operate large cranes that lift heavy metal objects, such as cars. Electromagnets are also used to make motors run in small appliances. Combining regular magnets and electromagnets makes it possible for electrical energy to be turned into energy of motion. ...
MAGNETISM
... • Just like with electric charges, field lines can also be drawn for magnets. • A great way to actually see field lines is to use iron filings. •Also, just like with electric charge, strength of field depends inversely on the distance to the ...
... • Just like with electric charges, field lines can also be drawn for magnets. • A great way to actually see field lines is to use iron filings. •Also, just like with electric charge, strength of field depends inversely on the distance to the ...
![ch-6 [Magnetism]](http://s1.studyres.com/store/data/004366853_1-cbc1ce7a74752c20e1a6e456bd1e46ed-300x300.png)
File
... 13. How can you weaken or demagnetize a magnet? Make the domains come unaligned by dropping it or heating it. 14. What are magnetic domains? Groups of atoms that act like tiny magnets and when they align the object becomes magnetized. 15. What happens to the domains in a permanent magnet? The domain ...
... 13. How can you weaken or demagnetize a magnet? Make the domains come unaligned by dropping it or heating it. 14. What are magnetic domains? Groups of atoms that act like tiny magnets and when they align the object becomes magnetized. 15. What happens to the domains in a permanent magnet? The domain ...
Interactions between Electricity and Magnetism
... Mag/Elec Interactions Electro-magnets If you coil a wire into a helical form (like wrapping a wire around a cylinder) and run a current through it, each circular coil creates a small mag field. The mag field from each coil “adds up” to create what looks like a magnet with a North and South po ...
... Mag/Elec Interactions Electro-magnets If you coil a wire into a helical form (like wrapping a wire around a cylinder) and run a current through it, each circular coil creates a small mag field. The mag field from each coil “adds up” to create what looks like a magnet with a North and South po ...
Electromagnetism
... Effects of Magnets on Electricity • A magnetic field has no effect on a static charge, but it does exert a force on the wire that carries a current. The force is at a right angle (900) to the direction of the current ...
... Effects of Magnets on Electricity • A magnetic field has no effect on a static charge, but it does exert a force on the wire that carries a current. The force is at a right angle (900) to the direction of the current ...
Module code SP-1202 Module Title Electricity and Magnetism
... - use software to plot and interpret electric and magnetic field distributions for various charge arrangements - apply theoretical skills developed in the lectures to analysing and solving problems in electricity and magnetism Higher order: 20% - demonstrate their ability to use laboratory equ ...
... - use software to plot and interpret electric and magnetic field distributions for various charge arrangements - apply theoretical skills developed in the lectures to analysing and solving problems in electricity and magnetism Higher order: 20% - demonstrate their ability to use laboratory equ ...
Magnetism & Electricity
... a stone substance called “magnetite.” They discovered that the stone always pointed in the same direction. Later, stones of magnetite called “lodestones” were used in navigation. ...
... a stone substance called “magnetite.” They discovered that the stone always pointed in the same direction. Later, stones of magnetite called “lodestones” were used in navigation. ...
SUMMARY 1. Define motor and generator. A motor is a device
... A motor is a device which converts electrical energy to mechanical energy (or motion). A generator is a device which converts mechanical energy into electrical energy. 2. What does the term “magnetic field” describe? The region surrounding a magnet where magnetic effects can be detected. A compass n ...
... A motor is a device which converts electrical energy to mechanical energy (or motion). A generator is a device which converts mechanical energy into electrical energy. 2. What does the term “magnetic field” describe? The region surrounding a magnet where magnetic effects can be detected. A compass n ...
forcibly push - Cloudfront.net
... p436 1820 Hans Oersted showed that current affected a magnet. 1831 Michael Faraday and Joseph Henry made electricity from magnets. Made it possible to light up cities at night and ruined the sleep habits of the new era. It was simple…just rotate (move) a loop of wire in a magnetic field and electric ...
... p436 1820 Hans Oersted showed that current affected a magnet. 1831 Michael Faraday and Joseph Henry made electricity from magnets. Made it possible to light up cities at night and ruined the sleep habits of the new era. It was simple…just rotate (move) a loop of wire in a magnetic field and electric ...
Electromagnetic Induction
... Where F force on conductor (N), B = magnetic field strength (T), I = current in conductor (A) and L = length of conductor in magnetic field (m) A current flowing parallel to a magnetic field experiences no force. The formula has been generalised, noting that the force is zero when the angle is zero ...
... Where F force on conductor (N), B = magnetic field strength (T), I = current in conductor (A) and L = length of conductor in magnetic field (m) A current flowing parallel to a magnetic field experiences no force. The formula has been generalised, noting that the force is zero when the angle is zero ...
Magnets and Electromagnets
... 2. Putting it in a strong magnetic field opposite its own 3. Increasing the temperature. ...
... 2. Putting it in a strong magnetic field opposite its own 3. Increasing the temperature. ...
The mysteries of the Earth`s magnetic field and sunspots
... Professor Annraoi de Paor stumbled into this field in mid-1998, solving a mathematical problem posted on the Internet by Raymond Hide, Emeritus Professor of Geophysics at Oxford, ostensibly to do with proving absence of chaos in the dynamics of a particular self-excited dynamo driving a series-wound ...
... Professor Annraoi de Paor stumbled into this field in mid-1998, solving a mathematical problem posted on the Internet by Raymond Hide, Emeritus Professor of Geophysics at Oxford, ostensibly to do with proving absence of chaos in the dynamics of a particular self-excited dynamo driving a series-wound ...
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.