When a charged particle enters a uniform magnetic field its kinetic energy

When a charged particle moves in a magnetic field its kinetic energy _______ .

When a charged particle moves in a magnetic field, does its kinetic energy always remain constant? Explain.

When a charged particle enter normal to a uniform magnetic field, it take a circular path. Name the particle accelerator using this principle,

When a positively charged particle enters a uniform magnetic field with uniform velocity, its trajectory can be a) a straight line b) a circle c) a helix

When a positively charged particle enters a uniform magnetic field with uniform velocity, its trajectory can be a) a straight line b) a circle c) a helix

when a positively charged particle enter a uniform magnetic field with uniform velocity its trajectory can be (a) straight line (b) a cicle a (c)helix