Motion in the Presence of Electric and Magnetic Field
Pitch of a hellical path of a particle moving in a magnetic field
If there is a component of the velocity parallel to the magnetic field (denoted by v∣∣), it will make the particle move along the field and the path of the particle would be a helical one. The distance moved along the magnetic field in one rotation is called pitch p. p=v∣∣T=qB2πmv∣∣
Motion of charged particle in combined electric and magnetic fields
Depending on the initial velocity of the charged particle the trajectory of motion in the crossed electric and magnetic fields can be trochoid, cycloid or even a straight line.