The figures below represent positively charged particles moving in the same uniform magnetic field. The field is directed from left to right. All of the particles have the same charge and the same speed . Rank these situations according to the magnitudes of the force exerted by the field on the moving charge, from greatest to least.

A neutron is injected into a region in which a uniform magnetic field is directed vertically downward. The path of neutron is initially perpendicular to the direction of the magnetic field.

When the neutron enters the field, it will:

An electron moves horizontally toward a screen. The electron moves along the path that is shown because of a magnetic force caused by a magnetic field. In what direction does that magnetic field point?

Two small objects each with a net charge of exert a force of magnitude on each other.

We replace one of the objects with another whose net charge is :

Next, we move the and charges to be times as far apart as they were:

Now what is the magnitude of the force on the ?

Une option

Two small objects each with a net charge of exert a force of magnitude on each other.

We replace one of the objects with another whose net charge is :

What is the magnitude of the force on the charge?