A n electrically charged particle enters into a uniform magnetic induction field in a direction perpendicular to the field with a velocity v then it travels

Options

A. with a force in the direction of the field
B. in a circular path with a radius directly proportional to `v^(2)`
C. in a circular path with a radius directly proportional to its velocity
D. in a straight line without accleration

Answer

C

Explanation

The electron moves in a circular path of radius r, where`(mv^(2))/r=qvBtherefore r=(mv)/(qB)` Thus `rproptov`.