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## Physics 212 Week 1 Notes

by: Gabrielle Ulrich

28

0

2

# Physics 212 Week 1 Notes PHYS 212

Marketplace > Pennsylvania State University > Physics 2 > PHYS 212 > Physics 212 Week 1 Notes
Gabrielle Ulrich
Penn State

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These are notes from lectures 1 and 2 of Physics 212
COURSE
PHYS 212
PROF.
Staff
TYPE
Class Notes
PAGES
2
WORDS
CONCEPTS
Physics 212 PSU
KARMA
25 ?

## Popular in Physics 2

This 2 page Class Notes was uploaded by Gabrielle Ulrich on Wednesday January 20, 2016. The Class Notes belongs to PHYS 212 at Pennsylvania State University taught by Staff in Winter 2016. Since its upload, it has received 28 views. For similar materials see PHYS 212 in Physics 2 at Pennsylvania State University.

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Date Created: 01/20/16
 Lecture 1:  There are 4 fundamental forces in Nature:  1. Gravitational  2. Weak  3. Strong  4. Electromagnetic   Electromagnetism is the underlying force behind most observable phenomena  Electricity (Lightning, electric current)  Magnetism ( Electric Motors, MRI)  Radiation (X-rays, Light)  Chemistry   Electric Charge  Electric charges create electric fields  Electric fields lead to forces on electric charges  Moving electric charges called current create magnetic fields   There are two types of charges:  Positive and Negative  Like charges repel and opposite charges attract  Charge is conserved (cannot be created or destroyed)  Charge is quantized in units of electron charge  e= 1.6 x 10^1Coulombs   Solids often have nuclei arranged in a fixed, periodic pattern  Electrons can be bound or free  When bound it is called an insulator (wood, glass, rubber)  When free it is called a conductor ( metal)  Qnet= (Np-Ne)e    Lecture 2:  Newton’s Third Law says: F 1 on 2= -F 2 on 1  Coulomb’s Law gives the force between point charges:  It lies along the line connecting the charges  Proportional to the magnitude of each charge  Inversely proportional to the separation squared  2  F 1 on 2= K*[(q1*q2)/r ]  Where K is a constant equal to 8.99 x 10 Nm Principle of Superposition  You must consider one pair at a time to figure out the force on a point charge  Calculate the force for each using Coulomb’s law  Then add all the vectors together   

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