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Single-molecule magnets: Iron lines up
Single-molecule magnets: Iron lines up

... materials is a key aim of research in molecular magnetism. The goal is not to compete with bulk magnets, such as those decorating the fridge door at home or operating valves in your car, whose magnetism depends on the collective contributions of neighbouring magnetic atoms arranged with long-range o ...
TE Activity: Yogurt Cup Speakers
TE Activity: Yogurt Cup Speakers

... electrons. The magnetic field lines give the direction in which the magnetic force acts is strong and spread out where it is weak. For instance, in a compact bar magnet, the towards the other. The magnetic force is strongest near the poles where these field li the presence of magnetic field lines is ...
An electromagnetic wave in vacuum has the electric and magnetic
An electromagnetic wave in vacuum has the electric and magnetic

For a long straight wire B = ( ìo I )/ ( 2 ð r) ìo = 4 ð x 10-7
For a long straight wire B = ( ìo I )/ ( 2 ð r) ìo = 4 ð x 10-7

... We will work this example in class. ...
Chapter 1 Earth`s Magnetic Field
Chapter 1 Earth`s Magnetic Field

LECTURE 11: MAGNETIC SURVEYS Magnetic surveys use
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... can be inferred from the shape of the anomaly (Peter’s half-slope method). The depth is given by: ...
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... (f) Electric generators produced electricity, on the principle of : (i) magnets have attractive property (ii) conductors carrying current behave like magnet ...
Electromagnets
Electromagnets

... creates an electrical current. Electric motors and generators work using the idea of electromagnetic one magnet will repel the north end of the other (and similarly, south will repel south). An electromagnet acts the induction. In any electrical appliance the motor is moved by the magnetic field pro ...
Chapter 15: Magnetism
Chapter 15: Magnetism

... The magnetic field The number of field lines in a certain area indicates the relative strength of the magnetic field in that area.  The arrows on the field lines indicate the direction of the force.  The closer the lines are together, the stronger the field.  Magnetic field lines always point aw ...
Magnetic Force - WordPress.com
Magnetic Force - WordPress.com

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PHYSICS 571 – Master`s of Science Teaching “Electromagnetism

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01 - TBAISD Moodle

... 13. Explain what happens to an electromagnet when there is no current in the wire. _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _________________________ ...
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... If a coil of wire is moved within a magnetic field so that it passes through the magnetic field, electrons in the wire are made to move. When the coil of wire is connected into an electric circuit (at the terminals A and a) the electrons get energy to move in a certain direction and a current will f ...
TOPIC 6.3: Magnetic Fields and Forces
TOPIC 6.3: Magnetic Fields and Forces

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ppt

... are made by towing a magnetometer behind the ship. • These instruments measure the magnitude of the magnetic field, but not the direction. • The magnetic anomaly is obtained by subtracting the regional field from the measured field. • The magnetic stripes run parallel to the ridges and are symmetric ...
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2016 Farada review sheet[1][1]

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01 - Edublogs

... 13. Explain what happens to an electromagnet when there is no current in the wire. _______________________________________________________________ _______________________________________________________________ _______________________________________________________________ _________________________ ...
marcelo.loewe
marcelo.loewe

... E. Ferrer, V.de la Incera and X. J. Wen (arXiiv: 1407.3503) have considered this problem for the the strong magnetic field scenario (no temperature), finding an anisotropic behavior where the coupling decreases with B . ...
Magnetism - Cabrillo College
Magnetism - Cabrillo College

... so the magnetic forces all balance out and the material is non-magnetic. In iron, however, the electrons in the atoms can be aligned so they “spin” in the same direction; this results in what we call a permanent magnet. Permanent magnets are often described as having magnetic "poles"--north and sout ...
chapter – 5 magnetic effects of electric current and
chapter – 5 magnetic effects of electric current and

RADIO SPECTROSCOPY METHODS Electron spin resonance (ESR
RADIO SPECTROSCOPY METHODS Electron spin resonance (ESR

... The NMR spectrum is the frequency dependence of the absorbance for the radio frequency electromagnetic radiation of the sample placed in the magnetic field. The electron cloud surrounding the proton influences the external magnetic field H0 . The nuclei will experience a local magnetic field, slight ...
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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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