What is the value of q/m for a particle that moves in a circle of radius 6.2 mm in a 0.56 T magnetic field if?What is the value of q/m for a particle that moves in a circle of radius 6.2 mm in a 0.56 T magnetic field if a crossed 220 V/m electric field will make the path straight?Best Answer - B .q.v = E .qv = E / BB .q .v = m .v^2 / Rv / R .B = q / mq / m = E / B^2 .R = 220 / 0.56^2 .6.2 .10^–3q / m = 1.13 .10^5 C/kg