Magnets and Magnetic Force. Introduction to magnetism.
An arrow, which is our convention for drawing vectors, looks something like this: The tip of an arrow is circular and it comes to a point, so that's the tip, if you look at it head-on, if it was popping out of the video.
Two particles, having the same charge but different velocities, are moving in a constant magnetic field (see the drawing, where the velocity vectors are drawn to scale). Which particle, if either, experiences the greater magnetic force? (a) Particle 1 experiences the greater force...
The magnetic field is described mathematically as a vector field. This vector field can be plotted directly as a set of many vectors drawn on a grid. Each vector points in the direction that a compass would point and has length dependent on the strength of the magnetic force.