Elec Magnetism & Light
Elec Magnetism & Light PHYS 241
Community College of Philadelphia
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This 2 page Class Notes was uploaded by Ms. Allie Wisoky on Sunday October 11, 2015. The Class Notes belongs to PHYS 241 at Community College of Philadelphia taught by Staff in Fall. Since its upload, it has received 11 views. For similar materials see /class/221235/phys-241-community-college-of-philadelphia in Physics 2 at Community College of Philadelphia.
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Date Created: 10/11/15
PHYS 241 Notes for Test 2 Chapter 24 Electric Potential Review and Summary is on p 645 Know the de nitions of change in electric potential energy AU and electric potential energy U as given in Eqs 241 and 242 in the rst section of the Review and Summary Know the de nitions of potential di erence AV and potential V as given in Eqs 247 and 248 in the second section of the Review and Summary Know the relationships between potential and electric potential energy as given in Eqs 245 and 246 in the second section of the Review and Summary You should know the de nition of an Equipotential Surface You should know Eq 2426 for the potential due to a point charge and Eq 2427 for the potential due to a collection of point charges You should know how to use Eqs 2441 to nd the components of the electric eld given the potential V06 y Z You should know how to nd the electric potential energy of a system of point charges See Sample Problem 246 on p 642 and homework problem 41 on p 650 You should be able to prove the following statement An excess charge placed on a conductor distributes itself so that the entire conductor including interior points is at a uniform potential once electrostatic equilibrium is attained Chapter 25 Capacitance Review and Summary is on p 675 You should know Equations 251 2519 and 2520 You should know how to nd the equivalent capacitance of a capacitance network and nd the charge on and voltage across any of the capacitors in the network Know that when a dielectric lls the space between the plates of a capacitor the capacitance becomes KC where C is the air capacitance and K is the dielectric constant of the dielectric You should know the de nition of the dielectric strength of a dielectric Continued on the other side You should know how to derive Eq 259 for a parallel plate capacitor Eq 2514 for a cylindrical capacitor Eq 2517 for a spherical capacitor Eq 2518 for an isolated sphere You should know Eqs 2521 and 2522 for the potential energy stored in a capacitor You should know Eq 2536 Gauss law with a dielectric