Terms
Second Right Hand Rule

Rule that gives the direction of the magnetic field about a currentcarrying
wire
Solenoid

A long, helical coil of wires
Formulae
Formula for the magnetic field around a straight wire

B =

Equation for the force, per unit charge, between two parallel current carrying
wires

=

Formula for the contribution by a small length of wire,
dl
, to the magnetic
field at a given point

dB =

Equation for the strength of the magnetic field on the axis of a ring

B =

Equation for the strength of the magnetic field at the center of a ring

B =

Formula for the magnetic field strength on the axis of a solenoid

B = (cosθ
_{1}  cosθ
_{2})

Formula for the magnetic field strength inside an infinite solenoid

B =
