Question

A charged particle enters a magnetic field b perpendicularly with velocity v and radius r what will happen

Answer 1

If the velocity of the charge particle is perpendicular to the B field the motion is circle with radius R=mv/qB. constant along the B direction and v⊥ moves in a circle. A charged particle enters a region with perpendicular electric and magnetic fields. ... Particles with this velocity will go through undeflected.