Question

A charged particle moves in a clockwise direction in a magnetic field which is perpendicular to the plane of paper directed downwards. What is the nature of charged particle ?

Answer 1

Force on the charged particle is given by:
F = q(v×B)
B is in downward direction.
to move in circular motion , charge particle will enter in the direction perpendicular to the field.
if charge particle is negatively charged then it will move in in clockwise direction.
positive charge article will move in anti−clockwise direction