A charged particle moves with velocity v parallel to a uniform magnetic field B. The magnetic force on the particle is

1. The magnetic force on a moving charge is F = qv × B. 2. The magnitude is F = qvB sin θ, where θ is the angle between v and B. 3. When v is parallel to B, θ = 0° so sin θ = 0. 4. Therefore F = 0; a charge moving along the field experiences no magnetic force. _Source: syllabus Physics Ch 4 "Moving Charges and Magnetism", §4.2.2_