When answering questions, say it well but say it briefly ! Show all math work and include all graphs. Part 1 What is an equipotential line and how is this simulation related to work and energy? 1) Go to the PhET simulations. 2) From the list on the left choose Electricity, Magnets, and Circuits. 3) Now pick "Charges and Fields". 4) Turn on “Show Numbers" 5) Place a positive i nano-coulomb charge near the center of the scheen. 6) In the lower left of the screen is a meter for indicating electric potential, in volts, created by the charge that you introduced. Record the voltage and turn on "Plot". 7) This line is much like a line on a geologic topo map. Explain the similarity - 8) You are on the side of a hill with a topo map of the region. If you walked so that your trip follows a topo line you would be doing no work on your backpack. Why? 9) If a second charge were placed on this line (don't do it), how much work is need to move it along the line? 10) Move the meter closer to the charge at the center of the screen. What is the new electric potential? Turn on plot again 11) Remember that electric potential is energy per charge (1 volt - 1 Joule/Coulomb). Is electric potential a vector or a scalar? 12) If a second positive charge were introduced and moved from the first equipotential line created to the second line (closer to the charge), would this involve positive or negative work? 13) Explain. 14) If the second positive charge were moved away from the first Positive charge, would this involve positive or negative work? 15) When energy was studied earlier in the year, a connection was found between kinetic energy, potential energy, positive work, and negative work. What is the connection?