PHYS 102 – Chapter 24 Review
(1) Electric Flux : , ,
(2) Gauss’ Law : ̃
(3) Charged Isolated Conductor in Electrostatic Equilibrium :
(i) Ein = 0
(ii) Excess charge must reside on the surface.
(iii) Just outside the conductor : E ^ surface , and E = s/eo
(4) Cylindrical Symmetry (Line Charge ): , r is the distance from the axis.
(5) Planar Symmetry :
(i) Non-conducting Sheet : ,
(ii) Conducting Plate : ,
(6) Spherical Symmetry :
(i) r ³ R ( Outside and on the surface ) : ̃ just like a point charge.
(ii) r < R ( Inside ) :
(a) Shell ( Conducting or Insulating ) : E = 0 ( qenc = 0 )
(b) Solid Conducting Sphere : E = 0 ( Ein = 0 for a conductor )
(c) Solid Insulating Sphere :
where r is the distance from the center of the sphere.