Coulomb's Law

 , where:

F = Force between two charged points (N)

k = Coulomb Constant ((N*m2)/C2)

q1 = Charge of point 1 (C)

q2 = Charge of point 2 (C)

r = Distance between points (m)

Current Density

 , where:

J = Current Density (A/m2)

 = Charge Density (C/m3)

V = Drift Velocity of Particle (m/s)

 = Electrical Conductivity (S/m)

E = Electric Field (N/C)

Electric Constant

Epsilon Naught defines the Electric Constant, also known as the permittivity of free space or the vaccum permittivity,

 , where:

 = Electric Constant (Fa/m)

 = Magnetic Constant (H/m)

Electric Dipole Moment

 , where:

p = Electric Dipole Moment (C*m)

q = Electric Charge of each particle (one positive, one negative) (C)

d = Distance between charges (m)

Electric Displacement Field

 , where:

D = Electric Displacement Field (C/m2)

 = Electric Constant (F/m)

E = Electric Field (N/C)

P = Polarization Density (C/m2)