Describe qualitatively the path of a charged particle moving in a uniform magnetic field with initial velocity
a. Parallel to the field
b. Perpendicular to the field and
C. At an arbitrary angle with the field direction.

Explanation

Force on the charge, F=qE. i. The speed increases if q is positive, otherwise decreases
ii. Initial velocity remains constant and in the field it is accelerated.
iii. The initial velocity may be resolved. The perpendicular component remains unaf Efected.
b. i. No change for direction and velocity.
ii. The path becomes circular.
iii. Generally, helix.