The diagram shows a negative charge moving in a magnetic field. in which direction is the magnetic force acting on the charge? right, left, into the screen, or out of the screen

By right hand rule direction of force will be towards left

Explanation:

Here we know that force due to magnetic field on moving charge is given by

here as we can see the figure

v = velocity of charge coming out of the plane

B = magnetic field vertically downwards

q = negative charge

so from above equation of force we will have

so direction of force will be towards left

it doesn't. it was imagined up in the middle ages.