Final answer:
The largest possible force on an electron in a magnetic field is obtained when the electron moves perpendicularly to the field, and it is calculated using the equation F = qvBsin(θ) with the angle θ being 90 degrees.
Step-by-step explanation:
The largest possible magnitude of the force on an electron due to the magnetic field is determined using the equation F = qvBsin(θ), where F is the force, q is the charge of the electron, v is the velocity of the electron, B is the magnetic field, and θ is the angle between the velocity of the electron and the direction of the magnetic field. The maximum force occurs when this angle is 90 degrees, which means sin(θ) is equal to 1. If an electron moves perpendicular to the magnetic field, as in practice problem 1, the force is calculated to be 1.6 × 10^-14 N (option b), which is the largest possible force when considering a 1.0-T magnetic field and an electron moving at 1.0 × 10^6 m/s.