Helical Path: Charges in Magnetic Field with Solved Example
physexams.com › blog › Motion-of-a-charged-particleSep 02, 2020 · Pitch of the helix: the distance traveled parallel to the magnetic field $B$ in one revolution is called the pitch of the helical path and is obtained as \begin{align*} p&=v_{\parallel}\,T\\&=(v\,\cos \theta)\,\left(\frac{2\pi\,m}{q\,B}\right)\end{align*} Thus, the formula for pitch of the helix is $p=\frac{2\pi\,mv\,\cos \theta}{q\,B}$.