Physics

Problem

A uniform magnetic field is directed along the

+z

-axis. A charged particle enters the field from the origin with its velocity lying in the

x

–

y

plane, making an angle of

30^{\circ}

with the

+x

-axis. a. When the particle is a proton, state whether its projection on the

x

–

y

plane moves in a clockwise or an anticlockwise circle as viewed from the

+z

direction. b. State the sense of rotation for an electron launched under identical conditions.