Question

a long wire carries a current toward the west in a magnetic field that is directed vertically downward, perpendicular to the surface of earth. what is the direction of the magnetic force on the wire?
o west
o east
o upward
o south
o north

Explanation:

Step1: Apply right - hand rule

Point the fingers of your right hand in the direction of the current (towards the west). Curl your fingers in the direction of the magnetic field (vertically downward). Then, 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 towards the north.

Answer:

north