A positive charge moving up enters a magnetic field pointing out of the screen. What is the direction of the magnetic
force on the charge?
up
down
Oright
left

According to the right-hand thumb rule, the forefinger gives the velocity of charge, the thumb gives the magnetic force and the center finger gives the direction of magnetic field.

then, as shown in the picture, the direction of the magnetic force on the charge is in the right direction.

Explanation:

the components of a vector are the parts of the vectors that are to each other.

b perpendicular