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

Question

Quizplus · Accepted Answer

The right-hand rule in electromagnetism indicates that if a proton (positive charge) moving north curves downward, the magnetic field must be directed towards the east. This rule states that if you point your thumb in the direction of the velocity of a positive charge (north, in this case) and your fingers in the direction of the magnetic field, your palm points in the direction of the force (downward, in this case).

A Proton,moving North,enters a Magnetic Field