Force experience by the charged particle due to electric field
= q
Force experience by the charged particle due to magnetic field
= q
(×) According to the problem, particle is moving with constant velocity means acceleration of particle is zero and also it is not changing its direction of motion.
This will happen when net force on particle is zero.
(i) if E = 0 and v || B , then
Fnet = 0
(ii) if E ≠0 , B ≠0 and
, are mutually perpendicular. And (iii) when both
and
are absent.