Force on a charge in electric and magnetic fields
A charge particle follows a parabolic path in a uniform electric field and a charged particel moving in a uniform magnetic field has two kinds of motions
lnear motion in the direction of magnetic field and circular motion in a plane perpendicular to the magnetic field. when charge q is moving perpendicular to the magnetic field B, the radius of the circular path is `r=(mv)/(Bq)`. If v and B makes an angle `theta`, then `r=(mvsintheta)/(Bq)`, and the time period `T=(2pim)/(Bq)`.
The time period of a charged particle undergoing a circular motion in uniform magnetic field is independent of its

Options

A. ellipse
B. circle
C. helix
D. straight line