A

charge

q magnetic field B

direction of motion of charge

Figure 10.14 The force on an electric charge moving through a magnetic field.

z x to the direction of the magnetic field and also perpendicular to its direction of motion.

Figure 10.14 illustrates a positive charge q moving outwards in a direction perpendicular to the page (the x direction). The magnetic field is in the y direction. The resulting force then acts in the z direction.

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