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Making a Magnet - Siemens Science Day
Making a Magnet - Siemens Science Day

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Producing Electric Current

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I Basic Spin Physics

Motion Along a Straight Line at Constant
Motion Along a Straight Line at Constant

... the components in the circuit : Electrical power = induced EMF x Current (voltage) Induced EMF is the energy supplied to each unit charge & current is the charge flow per second Electrical Power = Energy transferred per s from source ...
Physics_A2_37_GeneratingElectricity
Physics_A2_37_GeneratingElectricity

... the components in the circuit : Electrical power = induced EMF x Current (voltage) Induced EMF is the energy supplied to each unit charge & current is the charge flow per second Electrical Power = Energy transferred per s from source ...
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1 - אתר מורי הפיזיקה

... a DC current and place a compass near the electromagnet. Your screen should look something like what you see to the right, on Screen 1. Using the slider on the battery, observe how changing the voltage changes the current flow and what happens to the compass needle. Write down your observations rega ...
Applied Magnetism
Applied Magnetism

... the amplification factor for the internal field B due to an external field H. ...
Gary Glatzmaier, Los Alamos and Paul Roberts, UCLA
Gary Glatzmaier, Los Alamos and Paul Roberts, UCLA

magnetic field
magnetic field

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Magnetic Magic Teacher Guide

... Wegener proposed that the continents of the earth were once together and they had moved apart. Other scientists didn’t agree with him. Later data helped prove Wegener’s idea. When lava is deposited by a volcanic eruption, or when igneous rock is formed (cools from magma into rock) the iron particles ...
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Chapter 20 Michael Faraday Faraday`s Experiment – Set Up

... the magnetic field When the switch is closed, the ammeter reads a current and then returns to zero When the switch is opened, the ammeter reads a current in the opposite direction and then returns to zero When there is a steady current in the primary circuit, the ammeter reads zero ...
Chapter 8 Test Review – Electricity and Magnetism
Chapter 8 Test Review – Electricity and Magnetism

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RIN #1 POWER FREQUENCY ELECTRIC AND MAGNETIC FIELDS

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Today • Questions re: Magnetism problems 2 • HW: Magnetism

... field strength will increase by some number that is associated with iron (for Iron, k = 200). In essence, by filling the space with a magnetic material, you effectively increase the strength of the Electromagnet. ...
Magnetic Modelling – basic concepts
Magnetic Modelling – basic concepts

... The earth is surrounded by a magnetic field, which is believed to be generated by electrical currents in the liquid part of the earth’s core (Fowler, 1994). The shape of the earth magnetic field is very close to that of a bar magnet and the magnetic field lines are vertical close to the magnetic pol ...
Magnetism and the su..
Magnetism and the su..

... According to Equation 1, Fmag = qvBsin, magnetic force arises out of the movement of electrons in the coil (the qv part) and the application of a magnetic field supplied by the magnet (the B part). The movement of charge through the coil, which also gives rise to the coil's own magnetic field, and ...
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The Magnetic Field Attraction and Repulsion

... Magnetic flux density is a measure of how many lines of force flow through a given area. The unit of magnetic flux density is the tesla (T)1. B= ...
EE303 - Electromagnetic Fields
EE303 - Electromagnetic Fields

... potential, electrostatic field analysis in conductors and dielectric media, electrostatic energy, electrostatic boundary conditions, magnetostatic field, vector potential, magnetic circuits, magnetic energy, magnetostatik boundary conditions, quasi-static fields, time varying fields and Maxwell equa ...
Chapter 16: Electromagnets and Induction
Chapter 16: Electromagnets and Induction

... 1. The primary coil is connected to outside power lines. Current in the primary coil creates a magnetic field through the secondary coil. The primary coil’s field is shown by the magnetic field lines (green arrows) 2. The current in the primary coil changes constantly because it is alternating curre ...
Document
Document

... a DC current and place a compass near the electromagnet. Your screen should look something like what you see to the right, on Screen 1. Using the slider on the battery, observe how changing the voltage changes the current flow and what happens to the compass needle. Write down your observations rega ...
Experiment 5: Magnetic Fields of a Bar Magnet and of the Earth
Experiment 5: Magnetic Fields of a Bar Magnet and of the Earth

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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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