(a) A charge of -250e is uniformly distributed along a circular arc of radius 3.90 cm, which subtends an angle of 44°. What is the linear charge density along the arc? C/m
(b) A charge of -250e is uniformly distributed over one face of a circular disk of radius 2.00 cm. What is the surface charge density over that face? C/m2
(c) A charge of -250e is uniformly distributed over the surface of a sphere of radius 2.00 cm. What is the surface charge density over that surface? C/m2
(d) A charge of -250e is uniformly spread through the volume of a sphere of radius 2.00 cm. What is the volume charge density in that sphere? C/m3