A proton,moving west,enters a magnetic field.Because of this magnetic field the proton curves upward.We may conclude that the magnetic field must have a component
A)towards the west.
B)towards the east.
C)towards the south.
D)towards the north.
E)downward.

Question

Quizplus · Accepted Answer

The direction of the force on a moving charge in a magnetic field is given by the right-hand rule. Since the proton (a positively charged particle) curves upward while moving west, the magnetic field must have a component towards the south to create an upward force (when applying the right-hand rule).

A Proton,moving West,enters a Magnetic Field