Electric Charges and Fields

Question 1

Coulombs Law

Answer 1

F[e] = kq1q2 / d^2 where k = 9x10^9 (Nm^2/C^2)

Question 2

Electric Field Intensity

Answer 2

Electric force per unit charge.
E = F[e]2 / q2
E = kq / d^2 - q is central charge