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PPT - Mr.E Science
PPT - Mr.E Science

Chapter 11 Magnetism & Electromagnetism Magnets
Chapter 11 Magnetism & Electromagnetism Magnets

... Chapter 11 Magnetism & Electromagnetism ...
Magnets
Magnets

... Magnetic Poles – the ends of the magnet, area where the magnetic effect is the strongest. If a bar magnet is suspended by a thread or string, it will align itself so that one strong end points north and the other points south, hence the names for the “North” and “South” poles of the magnet. Like pol ...
magnet Any material that attracts iron and materials that contain iron
magnet Any material that attracts iron and materials that contain iron

what is a manget17213
what is a manget17213

Magnets Study Guide ckc
Magnets Study Guide ckc

... attract: to pull toward (poles that are different attract each other) ...
Magnetism
Magnetism

INSIDE THE POWER PLANT - Illinois Institute of Technology
INSIDE THE POWER PLANT - Illinois Institute of Technology

... rapidly inside a coil of wire. As you see in the conceptual diagram in the right, a turbine (usually powered by water or wind) spins a magnet inside a coil. This action induces an electric current in the coil that can be used to power a light bulb. ...
Student
Student

... attraction circular cobalt coming out of conserve direction distance domains ...
Electromagnets
Electromagnets

... Magnets can be used to sort iron and aluminium cans for recycling. Only the iron cans are attracted to the magnet. Magnets can also be used for holding fridge doors shut, and in compasses that sailors or walkers use. A wire with electricity flowing through it has a magnetic field around it. An elect ...
Document
Document

... 4. A magnet fills the space around itself with a kind of ______________________ energy called the magnetic field. 5. The force from a magnet gets ______________________ as it gets farther away 6. We now know that magnetism is created by _____________________ current and that electricity and magnetis ...
Electromagnetism - Smyrna Middle School
Electromagnetism - Smyrna Middle School

... • Like poles repel. (Push away) • Opposite poles attract. (Come together) ...
Ch 7 Magnetism and Its Uses
Ch 7 Magnetism and Its Uses

HSPS3-5
HSPS3-5

Magnets and Electricity
Magnets and Electricity

Magnetism and Electromagnetism Key Terms
Magnetism and Electromagnetism Key Terms

Magnetism
Magnetism

class number
class number

... 2) True False Like magnetic poles will repel one another, but unlike poles will attract. 3) True False The magnetic force is found everywhere around a magnet; not just at the poles. 4) Define “ferromagnetic” _______________________________________________________________ ____________________________ ...
5H10.11 - Compass Needles and Magnet
5H10.11 - Compass Needles and Magnet

... combinations of dipoles. Hence, the field lines must begin and end at opposite poles. The B-field vectors are tangent to the lines at all points. ...
Magnetism - WordPress.com
Magnetism - WordPress.com

... atoms group together in opposite charges (positivenegative) and cancel each other out  In magnetic substances, atoms group themselves into small regions – magnetic domains – an arrange themselves ...
Forces on Moving Charges in Magnetic Fields Standards
Forces on Moving Charges in Magnetic Fields Standards

... Forces on Moving Charges in Magnetic Fields Standards Students should understand the force experienced by a charged particle in a magnetic field, so they can: 1) Calculate the magnitude and direction of the force in terms of q, v, and B and explain why the magnetic force can perform no work. 2) Dedu ...
Week 4 Lessons
Week 4 Lessons

Attract Repel To push away, as similar poles of two magnets push
Attract Repel To push away, as similar poles of two magnets push

... Long-distance: Something that is far away Magnet: An object that sticks to iron Magnetism: A property of certain kinds of materials that causes them to attract iron or steel Pole: Either of two opposing forces or parts, such as the poles of a magnet Prediction: An educated guess based on data or pre ...
Prentice Hall Physical Science: Magnets I
Prentice Hall Physical Science: Magnets I

... Prentice Hall Physical Science: Magnets I Starting on page 612, answer the following questions: ...
18.1 - Pierce Public Schools
18.1 - Pierce Public Schools

< 1 ... 151 152 153 154 155 156 157 158 >

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.
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