1. As a proton moves through space, it creates
(a) An electric field only.
(b) A magnetic field only.
(c) Both an electric field and magnetic field.
(d) Nothing; the electric field and magnetic fields cancel each other out.
2. Which statements about the force on a charged particle placed in a magnetic field are true?
(a) A magnetic force is exerted only if the particle is moving.
(b) The force is a maximum if the particle is moving in the direction of the field.
(c) The force causes the particle to gain kinetic energy.
(d) The direction of the force is along the magnetic field.
(e) A magnetic field always exerts a force on a charged particle.