A Charged Particle of Mass 0

Multiple Choice

A charged particle of mass 0.0020 kg is subjected to a 6.0 T magnetic field which acts at a right angle to its motion. If the particle moves in a circle of radius 0.20 m at a speed of 5.0 m/s, what is the magnitude of the charge on the particle?

A) 0.0083 C
B) 120 C
C) 0.00040 C
D) 2500 C