Also known as Ampère's Law with Maxwell's Correction,

or

, where:

= Curl Operator

B = Magnetic B-Field (T)

Magnetic field created by a current:

, where:

B = Magnetic B-Field (T)

= Magnetic Constant (H/m), written as mu nought (u0)

= Pi

I = Current (A)

Given that the point charge is moving significantly below the speed of light:

, where:

B = Magnetic B-Field (T)

v = Velocity of Point Charge (m/s)

q = Charge (C)

= Magnetic Constant (H/m), written as mu nought (u0)

, where:

= Divergence

J = Current Density (A/m^{2})

= Charge Density (C/m^{3})

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)