A charged particle of mass 1.5 g is moving at a speed of 1.5*10^4 m/s. Suddenly, a uniform magnetic field of magnitude .150 mT in a direction perpendicular to the particle's velocity is turned on and then turned off in a time interval of 1.0 s. During this time interval, the magnitude and direction of the velocity of the particle undergo a negligivle change, but the particle move by a distance of .150 m in a direction perpendicular to the velocity. Find the charge on the particle.