= 5μF = 5 × 10–6C, m = 5 × 10–12kg, V = 1km/s = 103m/'
= 0.54metre = 54mc.
The velocity has a x-component along with which no force acts so that the particle, moves with uniform velocity.
The velocity has a y-component with which is accelerates with acceleration a. with the Vertical
component it moves in a circular crosssection. Thus it moves in a helix.