Student ID # ping Date Pre-Lab Mark: Section: Scaled Canvas Mark: Instructions: Complete the following worksheet and hand it in to your TA at the beginning of lab Read the Introduction and Safety Section of the Lab Manual Canvas Mark 1. Sketch a graph of the x-component of the electric field corresponding to an electric potential that: ..is constant along 1. 0.5|| ..decreases uniformly with distance in the positive r direction. 10.5] ..increases uniformly with distance in the positive a direction. (0.5) ..decreases as kq/x (for q>0) like a point charge. (0.5) 2. Explain why a conductor in electrostatic equilibrium should have no electric field parallel to its surface, nor within its bulk. (Hint: think about the forces on a free to move charged particle). I 3. When a steady current, I, is flowing through a conductor (e.g. the carbon paper here) with a non-negligible resistance, R, it will be possible to maintain a potential difference, AV = TR between parts of the conductor along the direction of the current. Explain why in this situation there should be an electric field in the direction of the current but not in the direction perpendicular to the current. 1