Final answer:
The force on an electron moving in a magnetic field is given by the equation F = qvB sin θ, also known as the Lorentz force.
Step-by-step explanation:
The force on an electron that moves with velocity v in a magnetic field b is given by the Lorentz force, which is expressed as F = qvB sin θ, where q is the charge of the electron, v is its velocity, B is the magnetic field strength, and θ is the angle between the velocity of the charge and the magnetic field.
The SI unit for magnetic field strength B is called the tesla (T). The direction of the force is perpendicular to the plane formed by v and B and can be determined using the right-hand rule.