Question

a long wire carries a current toward the west in a magnetic field that is directed vertically upward, perpendicular to the surface of earth. what is the direction of the magnetic force on the wire?
west
north
east
south
no magnetic force is exerted on the wire.

Explanation:

Step1: Apply right - hand rule

Point your right - hand fingers in the direction of the current (toward the west). Then, curl your fingers in the direction of the magnetic field (vertically upward). Your thumb will point in the direction of the magnetic force.

Step2: Determine the direction

When you perform the right - hand rule as described above, the thumb points south.

Answer:

south