Two identical +2.0μC point charges are 0.010m apart and move side by side with identical speeds of 3.0×106m/s in the same direction. At that instant, what is the approximate ratio of the magnitude of the magnetic force to the magnitude of the electric force that either charge exerts on the other, FB/FE?
a) 1×10−2
b) 1×10−8
c) 1×10−4
d) 1×10−3