NOTES ASK YOUR TEACHER PRACTICE ANOTHER A proton is acted on by a uniform electric field of magnitude 383 N/C pointing in the positive z direction. The particle is initially at rest. (a) In what direction will the charge move? ---Select--- (b) Determine the work done by the electric field when the particle has moved through a distance of 4.25 cm from its initial position. (c) Determine the change in electric potential energy of the charged particle. (d) Determine the speed of the charged particle. m/s