Two identical point charges travel in vacuum

PHYSICS · Subjective · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism

Problem

Two identical point charges travel in vacuum, each with its velocity perpendicular to the line joining it to point Q. Charge X moves at

3.0\times10^{6}\,\text{m/s}

, and charge Y moves at

1.0\times10^{6}\,\text{m/s}

. Both are the same distance from Q. Which charge produces the larger magnetic field magnitude at Q, and by what factor compared with the other?