Gauss’Law高斯定律

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Announcements,Check your e-mail daily for announcements.,If you are not subscribed to the listserv,you need to subscribe.See“Check your e-mail on the class web page,:/wfu.edu/matthews/courses/phy114/.,Lab grading policy linked from course page.Labs start Thursday!You must pass the lab to pass the course.,Reminder:lecture notes are online,as is a narrated Powerpoint on line charges.,Electric Flux,(N.m,2,/C),Electric flux is proportional to the total number of electric field lines through a surface,Concept Question,A cylindrical piece of insulating material is placed in an external electric field,as shown.The net electric flux passing through the surface of the cylinder is,1.positive.,2.negative.,3.zero.,General Flux Definition,Flux Through a Cube,Gausss Law,Start with a single charge and a spherical surface around it,Calculate the flux through the sphere,Generalize to any surface,