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To be or not to be? 1 Introduction
To be or not to be? 1 Introduction

Explore 2: Shifting Plates and Wandering Poles
Explore 2: Shifting Plates and Wandering Poles

... Students will model magnetic reversal patterns and use paleomagnetic data to demonstrate plate motion. Background Some rocks are naturally magnetized. How? When igneous rocks cool down from the molten stage, or when sand grains gently settle down through water, the iron-rich molecules tend to align ...
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... Here we find the solution by using an analogous method based on the results of static fields. The scalar potential caused by a point charge is obtained first, then use superposition principle to obtain the solution of the scalar potential due to a distribution of time-varying charge. If the source i ...
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Electromagnetic Induction

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as PDF - Unit Guide

... Physics, Motion and Force; and Electricity & Magnetism. You will have to register to use this site. • http://phet.colorado.edu/simulations/index.php?cat=Featured_Sims The University of Colorado, Boulder, Physics Education Technology (PhET) Simulations: follow the links to Motion; Energy, Work & Powe ...
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Engineering with Electricity and Magnetism: A Guided

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Vector potential, electromagnetic induction and “physical meaning”

... null (no galvanometer deviation), they prove that a variation of the magnetic flux does not produce an induced emf 5 . These experiments corroborate the theoretical statement according to which “The flux of the magnetic field through an arbitrary surface that has the circuit as contour is not the ca ...
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Magnetism



Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Every material is influenced to some extent by a magnetic field. The most familiar effect is on permanent magnets, which have persistent magnetic moments caused by ferromagnetism. Most materials do not have permanent moments. Some are attracted to a magnetic field (paramagnetism); others are repulsed by a magnetic field (diamagnetism); others have a more complex relationship with an applied magnetic field (spin glass behavior and antiferromagnetism). Substances that are negligibly affected by magnetic fields are known as non-magnetic substances. These include copper, aluminium, gases, and plastic. Pure oxygen exhibits magnetic properties when cooled to a liquid state.The magnetic state (or magnetic phase) of a material depends on temperature and other variables such as pressure and the applied magnetic field. A material may exhibit more than one form of magnetism as these variables change.
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