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## Study Guide for Exam 1

by: Katie Christopher

73

0

2

# Study Guide for Exam 1 PHY 111

Marketplace > Illinois State University > Physics 2 > PHY 111 > Study Guide for Exam 1
Katie Christopher
ISU
Physics For Science And Engineering II
Rebecca Rosenblatt

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Study Guide for Exam spanning electric field to capacitors. Outlines important equations and concepts
COURSE
Physics For Science And Engineering II
PROF.
Rebecca Rosenblatt
TYPE
Study Guide
PAGES
2
WORDS
KARMA
50 ?

## Popular in Physics 2

This 2 page Study Guide was uploaded by Katie Christopher on Sunday September 13, 2015. The Study Guide belongs to PHY 111 at Illinois State University taught by Rebecca Rosenblatt in Summer 2015. Since its upload, it has received 73 views. For similar materials see Physics For Science And Engineering II in Physics 2 at Illinois State University.

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Date Created: 09/13/15
PHY 111 Exam 1 Study Guide Equations to know Flux Qenclosed IE dA 50 Q1Q2 UP0tential Energy qV OR WITH MORE THAN 1 CHARGE U 47180 13912 b Vr Electric Potential gt Vb Va E dL a 47T 0 AV Ed Charge densities Linear A QL Surface 0 QA Volume p QV Capachance QV1Q2 1 2 2C 2 U Add a dielectricCW dielectric KCWo dielectric where K is usually a given constant Concepts to know Fields Positive fields point radially out negative fields point radially in Superposition To find net field E ADD all fields within area together Enet 2 E1 E2 En Continuous charge distributions make this an integral Magnitude of a field is not affected by signs of charges within the field Electric Field Lines From a point charge radial and density of lines is proportional to charge Go from positive charge to negative charge in a case with more than one charge Electricity and magnetism Gauss Law The flux coming out of a surface can be found with the charge enclosed within a defined space where E is constant within the surface over so Conductors have E 0 within them charges redistribute themselves to the surface of the conductor to be at equilibrium Use a Gaussian surfacea theoretical circle or cylinder that encloses the charge of interest depending on shape of charge to find E in 2shapes Electric Potential Energy For point charges potential energy is considered 0 when distance from charges is infinity AU k for 2 point charges where d is distance between them Electric Potential Measured in voltshence represented by V Eguipotentials Lines that are perpendicular to electric field lines where electric potential is constant from one line to another 0 Spacing of equipotentials shows strength of electric field closer stronger Capacitance and Capacitors Capacitance The ability to hold a charge Two plates with faces that face each other of opposite charges can hold charge between themcaled capacitors o In case where plates are connected to either end of a battery charge going TO battery and coming FROM battery is 0 Otherwise charges inside plates is NOT 0 whichis impossible since they re conductors 0 Wires in this case provide equipotentials so equations involving V have V as the charge of the battery plats are wired to Capacitor Units 0 Parallel 2 capacitors connected by branched off wire I Equipotential difference between both I V is same for both capacitors 39 Qtotal Q1 l39 Q2 VC1 l VCz 0 Series 2 capacitors connected one after the other I Q s of both capacitors are equal 39 Vtotal V1 l39 V2 1 i i Ctotal C1 C2 V of a capacitor stays constant when connected to a battery Q stays constant when battery is disconnected

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