A charged particle is moving in a uniform, constant magnetic field. Which one of the following statements concerning the magnetic force exerted on the particle is false?

Question

Quizplus · Accepted Answer

The magnetic force does not change the speed of the particle, only the direction of its motion. The magnetic force is always perpendicular to the velocity of the particle, so it cannot directly increase or decrease its speed. However, it can change the direction of the velocity, causing the particle to move in a circular or helical path. The magnetic force does no work on the particle because the force is perpendicular to the displacement of the particle, so there is no component of the force in the direction of motion. Therefore, choice B is false.

A Charged Particle Is Moving in a Uniform, Constant Magnetic