A long,straight,horizontal wire carries current toward the east.A proton moves toward the east alongside and just south of the wire.What is the direction of the magnetic force on the proton?
A)toward the north
B)toward the south
C)upward
D)downward
E)toward the east.

Question

Quizplus · Accepted Answer

The right-hand rule indicates that the magnetic field around the wire circulates clockwise when viewed from the east. Since the proton is moving in the same direction as the current (east) and is located to the south of the wire, the magnetic force on it will be directed toward the north.

A Long,straight,horizontal Wire Carries Current Toward the East