Question

Which of the following statements concerning the motion of a charged particle inside a uniform magnetic field is correct? (Assume the direction of initial velocity is parallel to the B-feild)

1)the charge moves in a circular orbit

2)the magnitude of the velocity does not change with time

3)the larger the initial speed of the particle, the larger the radius of the orbit

--2 only --2 & 3 --1 & 2 --1 & 3 -- all are true

Answer 1