If a charged particle (+q) is projected with certain velocity parallel to the magnetic field, then it will
trace helical path
trace circular path
continue its motion without any change
come to rest instantly
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-1 – 2015
When the velocity vector (v) is parallel to the magnetic field vector (B), the cross product (v x B) is zero. Therefore, the magnetic force (F) on the charged particle is zero. With no force acting on it, the particle will continue to move in a straight line with constant velocity according to Newton’s first law of motion.