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MSU - PHSC 1013 - Class Notes - Week 13

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MSU - PHSC 1013 - Class Notes - Week 13

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background image Physical Science  ____________________________________________________________________________ Chapter 6 Magnetite is naturally occurring iron oxide mineral 
­Attracts certain metals.  
Ferromagnetic (simply magnetic) materials are substances that are strongly 
attracted or repelled by a magnet.  Most common magnetic materials: iron, 
cobalt, nickel Magnetic Poles are the ends of a magnet where the force is concentrated.  ­North Pole or North­seeking pole is the end of the magnet that will point toward 
geographic north 
­ South Pole or South­seeking pole is the end of the magnet that will point toward geographic south  The Dynamo Theory says that a planet’s magnetic field is generated by
a spinning electrically conducting core
. Electromagnet is a cylindrical coil of wire that creates a strong magnetic field 
when currents pass through it
Electromagnetic Induction is the creation of an induced voltage by a magnet 
moving by coils of wire or coils of wire moving by a magnet
The amount of voltage increase or decrease varies based on the number of 
loops in the primary and secondary coils.
In a step down transformer, the primary has more loops than the secondary and 
the magnetic field has less of an effect on the secondary. The induced voltage is 
also less
In a step up transformer, the primary has fewer loops than the secondary and the
reverse is true. The induced voltage will be greater also

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School: Mississippi State University
Department: Physical Science
Course: Physical Science Survey 1
Professor: Paul Cuicchi
Term: Spring 2016
Tags: Magnetism
Name: 5) PH Chapter 6
Description: class notes
Uploaded: 11/11/2017
1 Pages 42 Views 33 Unlocks
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