A charged particle can be acceerated by a magnetic field..?

If v is the velocity of the particle and B is the magnetic field and q is the charge of the particle and ? is the angle between the direction of velocity and the magnetic field, then a force is exerted on the particle whose magnitude is given by q v B sin ? and its direction is ALWAYS PERPENDICULAR to the direction of the magnetic field and to the direction of the component of the velocity that is perpendicular to the field.



A perpendicular force cannot change the magnitude of the velocity and can only change the direction of velocity.