According to the right-hand rule, how is the magnetic force determined?

The right-hand rule is a fundamental principle used in physics to determine the direction of the magnetic force acting on a charged particle moving through a magnetic field. This rule states that if you point your thumb in the direction of the velocity of the charged particle (which is typically the direction of current flow for conventional current), and your fingers in the direction of the magnetic field, the palm of your hand will face in the direction of the magnetic force acting on the charged particle.

Thus, the magnetic force is determined by both the velocity of the charged particle and the orientation of the magnetic field. This combination allows us to calculate the magnetic force's direction effectively, demonstrating how both velocity and the magnetic field interact to exert a force on the moving charge.

The other options do not accurately reflect the relationship defined by the right-hand rule, as they don't incorporate both the velocity of the charged particle and the magnetic field's direction together in determining the resultant magnetic force.