Three identical positive point charges move simultaneously in vacuum
PHYSICS · Subjective · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism
Problem
Three identical positive point charges move simultaneously in vacuum. The following data describe each charge’s motion relative to point O at one instant:
• Charge 1: speed 4v, distance 2d, velocity perpendicular to the line connecting it to O.
• Charge 2: speed v, distance d/2, angle between its velocity and the line connecting it to O is 30∘.
• Charge 3: speed 2v, distance d, velocity perpendicular to the line connecting it to O.
Rank the magnitudes of the magnetic fields produced at O by the three charges from largest to smallest, indicating any ties, and briefly justify your ranking.