Physics 307 Homework
 RU Links   Radford University   Department of Physics   RU Planetarium   RUSMART pages (weather) Spring 2013 Classes & Info   PHYS 112   PHYS 307   PHYS/GEOL 406   My daily schedule   My C.V. Summer jobs/internships   NSF REU Program (list of REU sites) Other links   The Nucleus (resources for    physics/astronomy undergrads)   Pre-Health information   R.U.F.R.E.E.Z.I.N.G.    pics from the north pole trip    the picture from the trip   Simple 2-liter water rocket   American Institute of Physics Homework #3: Due Monday, February 18 by 10:00am Here is an electric field: E={Kx3x2y,Ky4y3} where this only has x- and y-components, and Kx and Ky take care of all constants and units. Find the potential difference φ between the following pairs of points: (a) (0,0) and (0,4), and (b) (6,0) and (6,9). problem 2.31 Note that the book is simply listing the x-, y- and z-components of the electric field vector E. problem 2.38 Four identical charges each have charge (+)3e. They are located at the corners of a square whose sides are 3 Angstroms long. Find the electric potential φ at the midpoint of one of the sides. (a) Find the general expression for the electric potential due to a line of charge that lies along the y-axis from y=(-)40cm to y=(+)90cm. There are (-)7.0µC distributed along the length of this line. (b) Find the electric potential due to this line charge at the point (x,y)=(35cm,(-)25cm).    That's all for homework #3.