UH PHYS 1302 - Exam 1 Review (26 pages)

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Exam 1 Review



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Exam 1 Review

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exam 1 review


Pages:
26
School:
University of Houston
Course:
Phys 1302 - Introductory to Physics II

Unformatted text preview:

Exam 1 Review 19 1 2 Electric Charge Conductors and Insulators Measure of charge is Coulomb and its quantized Electrons have negative charge 1 6 x 1019 C Protons have positive charge 1 6 x 1019 C Create static electricity in insulators Giving materials extra electrons Take them a away 19 1 2 Electric Charge Conductors and Insulators Insulators Electrons localized to atoms cannot move freely within material Conductors Electron delocalized can move freely within material Semi conductors Somewhere in between Ability to conductor depends on environment Temperature light etc 19 3 Coulomb s Law Determines force between 2 charges Force attractive for unlike charges repulsive for like 19 3 4 5 Electric Field and Field Lines Measures force per unit of charge on test charge q0 q0 q Fields point in the direction of where free positive charge will move 19 6 Electric Shielding For conductors with excess charge charges move to surface Leads to zero field at the center Shielding 19 7 Electric Flux and Gauss s law Gauss s Law Flux through a surface enclosing charge q is 20 1 2 3 Electric Potential and Potential Energy Electric Potential can be thought of as electric potential energy per unit of charge If a charges gains or loses energy Moves through a region with a potential difference 20 1 2 3 Electric Potential and Potential Energy Change in electric potential energy is equal to the work done distance moved q0 Electric field For point charges q 20 4 Equipotential Surfaces Surfaces of equal electric potential Run perpendicular to electric field lines 20 5 6 7 Capacitors Dielectrics and Energy stored Capacitance of a system charge potential difference For parallel plates area separation 20 5 6 7 Capacitors Dielectrics and Energy stored Dielectrics boost capacitance by decreasing potential difference If V becomes too big dielectric breakdown I e it stops working Potential energy in a capacitor given by 21 1 Electric Current Flow of electric charge around closed path Direction of



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