12 electrons are equally spaced and fixed around circle of radius 0.5 cm.
A) Relative to V = 0 at infinity, what are the electric potential and electric field at the center C of the circle due to these electrons?
B) If the electrons are moved along the circle until they are non uniformly spaced over a 120 degree arc, what then is the potential at C?
C) How does the electric field at C change (if at all)? Describe