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Producing Electric Current - District 273 Technology Services

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Phys 202 Fall 2000

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Lecture 12: Electromagnetic Induction

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Experiment 5: Magnetic Fields of a Bar Magnet and of the Earth

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DETECTION OF UNPAIRED ELECTRONS

... sample would give two different shifts on two different instruments. Coupling in EPR Coupling is a phenomenon in which magnetic fields interact with each other. In EPR, coupling comes about because of the influence of nearby nuclei on the electron that is being observed. For example, you may already ...
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1 PHYS:1200 LECTURE 27 — ELECTRICITY AND MAGNETISM (5

... magnetic  field  which  permeates  space  in  a  manner  similar  to  the  gravitational  field  that  surrounds the Earth. The magnetic field of a bar magnet can be visualized by sprinkling iron filings  around it as shown above on the left side. The ion filings settle into a two‐dimensional patter ...
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Slide 1

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methodological aspects of gas phase studies of an electric

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MAGNETIC TOROUE: Experimenting with the magnetic dipole

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TOPIC 6: Fields and Forces

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Chapter 16: Electromagnets and Induction

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Ch 32 Maxwell`s Equations Magnetism of Matter

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Magnetic Forces (7/9)

< 1 ... 67 68 69 70 71 72 73 74 75 ... 161 >

Force between magnets



Magnets exert forces and torques on each other due to the complex rules of electromagnetism. The forces of attraction field of magnets are due to microscopic currents of electrically charged electrons orbiting nuclei and the intrinsic magnetism of fundamental particles (such as electrons) that make up the material. Both of these are modeled quite well as tiny loops of current called magnetic dipoles that produce their own magnetic field and are affected by external magnetic fields. The most elementary force between magnets, therefore, is the magnetic dipole–dipole interaction. If all of the magnetic dipoles that make up two magnets are known then the net force on both magnets can be determined by summing up all these interactions between the dipoles of the first magnet and that of the second.It is always more convenient to model the force between two magnets as being due to forces between magnetic poles having magnetic charges 'smeared' over them. Such a model fails to account for many important properties of magnetism such as the relationship between angular momentum and magnetic dipoles. Further, magnetic charge does not exist. This model works quite well, though, in predicting the forces between simple magnets where good models of how the 'magnetic charge' is distributed is available.
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