(1) What are the differences between electric insulators and conductors?
(2) The electric field between two large conducting plates is uniform, 100kN/C, pointing from plate A to plate B. If the two plates are separated by 5cm, what is the potential difference between these two plates? Which plate has a higher electric potential?
(3) There is a spherical conductor with a total charge +Q, and a radius of R, illustrate:(a) Charge distribution;(b) electric field lines;(c) equi-potential lines(surfaces).