Which of the following statements is true about the motion of a charged particle? (i) A charged particle entering a region of uniform magnetic field can change its speed due to the magnetic field. (ii) A charged particle entering a region of uniform magnetic field can change its direction due to the magnetic field. (iii) A charged particle entering a region of uniform electric field can change its speed due to the electric field. (iv) A charged particle entering a region of uniform electric field can change its direction due to the electric field.
