The magnetic force on a point charge in a given magnetic field and at a given speed is largest when the charge
A) has velocity components both parallel to and perpendicular to the field.
B) moves perpendicular to the magnetic field.
C) moves in the direction opposite to the magnetic field.
D) moves in the direction of the magnetic field.

Question

Quizplus · Accepted Answer

The magnetic force on a point charge is given by the equation F = qvBsinθ, where q is the charge, v is the velocity, B is the magnetic field strength, and θ is the angle between the velocity vector and the magnetic field vector. When the charge moves perpendicular to the magnetic field, the angle θ is 90 degrees and sinθ = 1, maximizing the magnetic force. Therefore, choice B is the best option. Choices A, C, and D would all result in a smaller magnetic force acting on the charge.

The Magnetic Force on a Point Charge in a Given